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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from Bluetooth, IPSec and Netfilter.
Current release - fix to a fix:
- netfilter: ipset: remove need to allocate memory on delete operations
Current release - regressions:
- macb: drop CONFIG_OF #if block, fix build
Previous releases - always broken:
- stream of fixes for SCTP continues
- inet: frags: strip GSO state from fragments before reassembly
- virtio-net: ensure that TCP packets don't overflow gso_segs
- tcp-ao: fix use-after-free of current_key on reconnect to another
peer
- page_pool: remove zone/policy GFP flags when allocating XArray
entries
- Bluetooth: L2CAP: reject accept queue add unless BT_LISTEN
- tls: device: fix out-of-bounds write in tls_append_frag()
- eth: bnxt:
- ring the doorbell when SW USO exits early, avoid packets stuck
in Tx
- gate TPH enablement behind BNXT_SUPPORTS_QUEUE_API check, avoid
users of older NICs seeing non-actionable warning messages
- eth: qede: fix NULL pointer dereference in TPA fragment processing"
* tag 'net-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (216 commits)
inet: frags: strip GSO state from fragments before reassembly
net/sched: sch_htb: limit htb_classify inner-class filter hops
selftests/net: packetdrill: add tcp_urg_ptr_retransmit
tcp: fix corruption of urgent data on multi-segment retransmit
usb: atm: usbatm: fix invalid ci_range initialization
net: fec: only stop PTP if it was initialized
slip: remove slip_hangup() to fix use-after-free in slip_receive_buf()
net: bridge: mcast: fix use-after-free of a master VLAN's multicast context
net/sched: bound qdisc_pkt_len to prevent qdisc soft lockup
net: dsa: mxl862xx: enable assisted learning on CPU port
net: stmmac: restore NET_IP_ALIGN in the RX DMA offset
net: stmmac: drop gso_enabled_types and rely on netdev features
net: stmmac: selftests: Don't test flow control for small rx fifos
net: stmmac: selftests: Account for the UC filter list for filtering tests
net: stmmac: dwxgmac: Account for the primary MAC address for UC filtering
net: stmmac: dwmac4: Account for the primary MAC address for UC filtering
net: stmmac: dwmac1000: Account for the primary MAC address for UC filtering
net: stmmac: selftests: Check multiple MMC counters
selftests: net: Fix slow configurations in big_tcp_tunnels.sh
selftests: net: Lower threshold with csum offload off in big_tcp_tunnels.sh
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git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for net:
1) Use DEBUG_NET_WARN_ON_ONCE() instead of WARN_ON() from the tproxy
datapath, a recent bug found a way to reach WARN_ON from datapath
due to insufficient validation of xt_TPROTO checkentry.
From Fernando F. Mancera.
2) Similar to previous patch to replace WARN_ON_ONCE by
DEBUG_NET_WARN_ON_ONCE() for connlimit. Not known issue, but
since this patch has been around for a while, let's merge it.
Also from Fernando.
3) Move nf_tables harware offload commit path after chain blob
and audit to reduce chances of leaving the hardware in
inconsistent state.
4) Add missing vzeroupper to nf_tables pipapo AVX2 to address
performace degradation to later user of SSE code,
from Eric Biggers.
5) Remove pr_debug() in x_tables extensions, a recent bogus found a
way to print a unsanitized string in xt_IDLETIMER, many of these
pr_debug() calls are there for historical reasons.
6) Use pr_info_ratelimited() in x_tables .checkentry.
7) Fix an imbalance in module refcount due to incorrect override
expression logic with sets. Remove unnecessary clone in control
plane, use the existing expressions provided by set or dynset
expression. Release override expressions only.
8) Tigthen nf_tables device name removal, it is possible to remove
prefix strings with exact device name. From Fernando F. Mancera.
9) Set on the set dead bit earlier, otherwise it is possible to
call .commit on deleted sets. This also addresses the
re-introduction of a bug.
* tag 'nf-26-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
netfilter: nf_tables: remove leftover set_update_list
netfilter: nf_tables: set on dead bit when performing early element removal
netfilter: nf_tables: skip double clone set expressions on element insert
netfilter: x_tables: replace pr_{info,err}() by pr_info_ratelimited()
netfilter: x_tables: remove pr_debug
netfilter: nft_set_pipapo_avx2: add missing vzeroupper
netfilter: nf_tables: move hardware offload step after building the chain blob
netfilter: conncount: use DEBUG_NET_WARN_ON_ONCE on reaching count limit
netfilter: tproxy: use DEBUG_NET_WARN_ON_ONCE for protocol fallbacks
====================
Link: https://patch.msgid.link/20260827141733.423453-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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qdisc_get_stab() accepts a user-supplied size table, and
__qdisc_calculate_pkt_len() amplifies qdisc_pkt_len() through the
overhead, the size-table data (u16), and size_log (up to
STAB_SIZE_LOG_MAX). A crafted stab can therefore set qdisc_pkt_len()
to ~1 GiB for an ordinary skb. Per-flow deficit schedulers such as
DRR and ETS replenish one quantum per loop iteration; with a tiny
quantum (1) they spin billions of times under the qdisc lock,
producing a soft lockup / RCU stall as illustrated by vega@nebusec.ai.
Cap the final qdisc_pkt_len() to QDISC_PKT_LEN_MAX so the size-table
amplification cannot drive deficit schedulers into an unbounded loop.
A legitimate size table (e.g. qfq's overhead 999999999, which is
handled by dropping) is still accepted.
Introduce cap QDISC_PKT_LEN_MAX (1 << 20) = 1 MiB which is well above
any legitimate single-skb wire length: the largest current skb->len
is GSO_MAX_SIZE (524280), and an ATM-style size table (53/48 cell tax)
amplifies that to ~578 KB, both comfortably below 1 MiB. At the same
time, 1 MiB bounds the deficit refill loop to ~1M iterations per
packet with quantum=1, which completes in a few milliseconds well
under the demonstrated softlockup threshold (~10^9 iterations).
Conditions to recreate the bug:
- CONFIG_NET_SCHED=y, CONFIG_NET_SCH_DRR=y (or CONFIG_NET_SCH_ETS=y).
- Attach a DRR (or ETS) root qdisc with a crafted TCA_STAB that
amplifies qdisc_pkt_len to ~1 GiB (e.g. size_log=15, data=[32768]).
- Add a class with a tiny quantum of 1 and send one small packet; the
deficit loop spins billions of times under the qdisc lock and trips
the softlockup detector (panic with kernel.softlockup_panic=1).
- Reachable as root or from an unprivileged user in a fresh user+net
namespace (unshare -Urn) with namespace-local CAP_NET_ADMIN.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: vega@nebusec.ai
Tested-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20260825081403.133992-1-jhs@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds
Pull LED updates from Lee Jones:
"New Support & Features:
- Core: Extend netdev trigger speeds up to 100G
- PWM Multicolor: Introduce default-intensity property
- Analog Devices LTC3220: Add support for 18 channel LED driver
- NXP PCA963x: Add multicolor LED class support
Improvements & Fixes:
- GPIO: Clear error pointers for skipped LEDs
- Broadcom BCM63138: Use %pe to print pinctrl error instead of %ld
- ISSI IS31FL319x: Modernize device registration by using fwnode APIs
- NXP PCA9532: Fix inverted GPIO output polarity
- NXP PCA9532: Fix phantom device registration on missing hardware
- STMicroelectronics ST1202: Correct and extend hw_pattern
documentation
- STMicroelectronics ST1202: Fix channel disable logic on zero
brightness and ensure brightness changes are applied in active mode
- STMicroelectronics ST1202: Fix hardware pattern sequence
programming, validate inputs, and correct pattern duration
calculations
- STMicroelectronics ST1202: Validate LED reg property against
channel count
- TI LP5860: Fix a potential double-unlock during device
initialization and fix error handling path by using
devm_mutex_init()
Cleanups & Refactoring:
- GPIO: Make legacy gpiolib interface optional
Device Tree Binding Updates:
- Core: Add default-intensity property
- Core: Document "gpio" trigger
- Analog Devices LTC3220: Add DT binding for LTC3220 18 channel LED
driver
- Broadcom BCM6358: Convert to DT schema
- LaCie NS2: Convert to DT schema
- NXP PCA963x: Add multicolor LED support
- NXP PCA963x: Fix reg maximum for pca9635
- TI TPS65217: Convert backlight bindings to DT schema"
* tag 'leds-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds: (29 commits)
leds: is31fl319x: Modernize registration
dt-bindings: leds: lacie,ns2-leds: Convert to DT schema
leds: pca963x: Add multicolor LED class support
dt-bindings: leds: nxp,pca963x: Add multicolor LED support
dt-bindings: leds: nxp,pca963x: Fix reg maximum for pca9635
leds: gpio: Clear error pointers for skipped LEDs
dt-bindings: leds: backlight: Convert TPS65217 to DT schema
leds: pca9532: Fix phantom device registration on missing hardware
leds: gpio: Make legacy gpiolib interface optional
leds: bcm63138: Use %pe to print pinctrl error instead of %ld
dt-bindings: leds: Add default-intensity property
leds: ltc3220: Add Support for LTC3220 18 channel LED Driver
dt-bindings: leds: Add LTC3220 18 channel LED Driver
dt-bindings: leds: bcm6358: Convert to DT schema
dt-bindings: leds: Document "gpio" trigger
leds: st1202: Correct and extend hw_pattern documentation
leds: st1202: Validate LED reg property against channel count
leds: st1202: Disable channel when brightness is set to zero
leds: st1202: Fix brightness having no effect while pattern mode is active
leds: st1202: Fix spurious pattern sequence start in setup
...
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git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"New Support & Features:
- MediaTek MT6397: Add mt6323 AUXADC support
- MediaTek MT6397: Add mt6323 EFUSE support
- Spreadtrum SC27xx: Add SC2730 regulator cell
Improvements & Fixes:
- Apple SMC: Fix key count endianness annotation
- Azoteq IQS62x: Reject zero-length firmware records
- ChromeOS EC: Introduce cros_ec_read_features helper and read
features during probe to catch transfer errors
- Cirrus Logic CS42L43: Fix regmap defaults ordering
- Cirrus Logic CS42L43: Remove redundant NULL checks on SoundWire
- Congatec Board Controller: Fix teardown ordering in cgbc_remove()
- HP iPAQ Micro: Fix out-of-bounds stack read in ipaq_micro_str
- Marvell 88PM886: Initialize the battery page
- QNAP MCU: Keep the reply buffer alive past a command timeout
- RAVE SP: Validate received frame payload lengths
- Silicon Labs Si476x: Drop duplicate NULL checks
- Silicon Labs Si476x: Modernize GPIO handling
- Silicon Motion SM501: Fix potential memory leaks during remove
- UCB1x00: Convert Assabet gpio-keys to use software nodes and
register software node for GPIO controller
- Viperboard: Fix native fields type in structures as little-endian
- Viperboard: Remove redundant NULL check before kfree()
- X-Powers AXP20x: Preserve other control bits when powering off
Cleanups & Refactoring:
- Core: Drop unused assignment of spi_device_id driver data
- Core: Initialize spi_device_id arrays using member names
- Core: Unify style of spi_device_id arrays
- Maintainers: Add Intel LPSS section to follow the changes
- Maintainers: Add a mailing list entry to MFD
- Cirrus Logic CS42L43: Format sdw_device_id table
- Cirrus Logic CS42L43: Use new SoundWire enumeration helper
- ROHM PMIC: Factor out power button registration and convert
gpio-keys to use software nodes
- ST-Ericsson DB8500: Fold dbx500 header into db8500
Device Tree Binding Updates:
- Core: Add techvision vendor prefix
- Marvell 88PM886: Allow vbus regulator
- MediaTek MT8195 SCP: Add support for MT8189 SoC
- Qualcomm SPMI PMIC: Document PMG1110
- Qualcomm SPMI PMIC: Document haptics device
- Qualcomm TCSR: Add compatible for Hawi and Maili SoCs
- Qualcomm TCSR: Add compatible for Shikra
- Qualcomm TCSR: Document the IPQ9650 TCSR block
- STMicroelectronics STMPE: Fix typo st,stmpe601 (should be
st,stmpe610)
- Syscon: Add ESWIN EIC7700 compatible
- Syscon: Allow syscon compatible for Loongson-2K0300 chip id
- Syscon: Disallow simple-bus with syscon
- Syscon: Drop custom select for older dtschema
- TI OMAP USBHS TLL: Convert to DT schema"
* tag 'mfd-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (45 commits)
mfd: cs42l43: Fix regmap defaults ordering
dt-bindings: mfd: syscon: Allow syscon compatible for Loongson-2K0300 chip id
dt-bindings: mfd: syscon: Add ESWIN EIC7700 compatible
mfd: qnap-mcu: keep the reply buffer alive past a command timeout
dt-bindings: mfd: qcom,tcsr: Document the IPQ9650 TCSR block
mfd: macsmc: Fix key count endianness annotation
dt-bindings: mfd: qcom,spmi-pmic: Document haptics device
mfd: iqs62x: Reject zero-length firmware records
mfd: rave-sp: validate received frame payload lengths
mfd: sm501: Fix potential memory leaks during remove
mfd: viperboard: Fix native fields type in structures as little-endian
mfd: si476x-i2c: Get rid of duplicate NULL checks
dt-bindings: mfd: Convert OMAP USB TLL to DT schema
mfd: cgbc: Fix teardown ordering in cgbc_remove()
mfd: mt6397-core: Add mt6323 AUXADC support
dt-bindings: mfd: qcom,tcsr: Add compatible for Hawi and Maili SoCs
mfd: rohm: Factor out power button registration
mfd: ucb1x00: Convert Assabet gpio-keys to use software nodes
mfd: ucb1x00: Register software node for GPIO controller
mfd: cs42l43: Tidy up formatting on sdw_device_id table
...
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull more MM updates from Andrew Morton:
- "mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff"
(Lorenzo Stoakes)
Index MAP_PRIVATE file-backed folios by their anonymous page offset
to resolve confusion around reverse mapping for zeroed and CoW'd
file-backed memory.
Use this new VMA anonymous page offset tracking to eliminate index
conflicts and lay the foundation for scalable CoW performance
improvements.
- "promote mapped executable folios after first usage for MGLRU"
(Baolin Wang)
Make MGLRU's protection of mapped executable file folios more
reliable. Follow the classical LRU's logic, promoting mapped
executable file folios after their first usage to give executable
code a better chance to stay in memory and improve workload
performance.
- "mm: vmscan: fix node reclaim ignoring swappiness parameter" (Ridong
Chen)
Fix per-node proactive reclaim interface's ignoring the swappiness
parameter when CONFIG_MEMCG is disabled by consolidating
sc_swappiness() into a single function that checks
proactive_swappiness regardless of kernel configuration.
- "mm/vmscan: reduce lru_lock contention via vmstat-derived
scan-balance cost" (Usama Arif)
Reduce lru_lock contention in the reclaim path by deriving
scan-balance costs from vmstat counters rather than lock-acquired
producer updates.
Read and decay these cost signals on the reclaim side under a
dedicated per-lruvec lock, reducing total LRU lock wait time by over
60% without impacting scan throughput.
- "zram: fix zram issues reported by sashiko" (Sergey Senozhatsky)
Fix two low-risk zram bugs which Sashiko spotted in drive-by review.
- "Honor XA_FLAGS_ACCOUNT in xas_split_alloc() and charge to folio's
memcg" (Zi Yan)
Fix xas_split_alloc() by enabling target folio memcg charging during
splits and adding the missing __GFP_ACCOUNT flag for proper XArray
node memory accounting.
- "selftests/mm: use pattern matching in .gitignore" (Pratyush Mallick)
Replace hardcoded binary names in selftests/mm/.gitignore with a
generic pattern-matching rule to automatically ignore generated test
files and avoid manual updates when adding new tests.
- "mm/page_ext: remove pgdat_page_ext_init()" (Sang-Heon Jeon)
Make the incompatibility between FLATMEM and NUMA explicit in
mm/Kconfig and remove the unused pgdat_page_ext_init() function.
- "zram: fix zstd error paths and add parameter validation" (Haoqin
Huang)
Clean up zram compression backends by removing redundant error
cleanup, adding parameter and dictionary validation, auto-prefixing
algorithm error logs, and resetting parameters prior to
reinitialization.
- "zram: fix stale scan bounds after reinitialization" (Longlong Xia)
Prevent out-of-bounds slot accesses during concurrent zram resets by
moving table scan bound calculations under dev_lock in
writeback_store() and read_block_state().
- "add anon mTHP collapse test cases" (Baolin Wang)
Extend selftests helper functions to support arbitrary page orders
and add new test cases and options for mTHP collapse in khugepaged.
- "selftests/mm: Handle unsupported and transient test conditions"
(Muhammad Usama Anjum)
Update MM selftests to report a SKIP status instead of a failure when
required kernel or filesystem features are unsupported, while adding
retry logic for transient page migration errors.
- "mm/zswap: Fixes and improves the zswap shrink" (Hao Jia)
Fix the missing zswap global shrinker when CONFIG_MEMCG is disabled
and extend shrink_memcg() to support batch writeback for improved
writeback efficiency.
- "alloc_tag: introduce IOCTL-based filtering for MAP" (Suren
Baghdasaryan)
Introduce an IOCTL-based binary interface for memory allocation
profiling that enables kernel-side filtering before per-CPU counter
aggregation.
This eliminates the text-parsing overhead of /proc/allocinfo and
provides up to a 20x speedup by transferring only filtered allocation
data to userspace.
- "better block swap batching and a different take on swap_ops v5"
(Christoph Hellwig)
Refactor block swap I/O to use swap_iocb for batching instead of
single-bio requests and rebase the swap_ops interface, achieving
faster swap throughput during kernel builds.
- "mm: kmemleak: reduce transient false positives by confirming leaks"
(Catalin Marinas)
Reduce false-positive kmemleak reports by combining two kmemleak
enhancements that add a second confirmation scan and a configurable
minimum unreferenced scan count module parameter.
- "mm: kmemleak: default min_unref_scans to 2 for verbose kernels"
(Breno Leitao)
Auto-scanning kernels can generate false-positive memory leak reports
on single scans, so this patch defaults min_unref_scans to 2 when
CONFIG_DEBUG_KMEMLEAK_VERBOSE is enabled to require a second
confirming scan.
- "swap_ops updates" (Christoph Hellwig)
Batching I/O for synchronous swap devices causes performance
regressions and filesystem-based swap suffers from double-indirection
overhead. This series resolves both issues by reintroducing per-folio
writes for synchronous swap and allowing filesystems to directly
export their own swap_ops.
- "mm/khugepaged: several cleanups" (Nico Pache)
khugepaged accumulated redundant state-checking patterns and outdated
comments following mTHP integration. Introduce dedicated helpers for
PTE validation and event counting while refreshing the internal
documentation.
- "maple_tree: lock checking and clean ups" (Liam Howlett)
Syzbot reports incorrectly blame memory management exit paths for
locking bugs, maple tree erase operations risk allocation failures
without gfp flags and internal documentation lacks clarity.
Improve lock error detection, update docs, fix race and allocation
edge cases and optimize erase allocations using a fallback to
GFP_KERNEL | GFP_NOFAIL.
* tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (172 commits)
selftests/proc: make proc-maps-race work with READ_IMPLIES_EXEC
memcg: move LRU size accounting on reparenting instead of copying it
mm/vmscan: fix comment logic in balance_pgdat
maple_tree: add helper mas_make_walkable()
maple_tree: avoid extra gap calculation
maple_tree: fix argument name in header
maple_tree: change two GFP flags in tests
maple_tree: document erase and allocations better
maple_tree: avoid mas_erase() and mtree_erase() failures
maple_tree: document that erase may use GFP_KERNEL for allocations
maple_tree: catch race in mas_alloc_cyclic()
maple_tree: add bulk parent set helper
maple_tree: micro optimisation of mas_wr_store_type()
maple_tree: optimise mas_wr_node_store() when not in rcu mode
maple_tree: use prefetched value in mas_wr_store_type()
maple_tree: clarify comments on mas_nomem()
maple_tree: drop MAPLE_ALLOC_SLOTS
maple_tree: drop dead code from mas_extend_spanning_null()
maple_tree: documentation fix
maple_tree: add write lock checking with lockdep sequence numbers
...
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Both the dynset and newsetelem path clone the existing set expressions
when setting set element expressions if no override expressions are
provided. This results in a double clone, once to clone the template set
expressions then another clone on the new element. Add a flag to
annotate if userspace provides a override expression (ie. expression of
the same type of the set but different configuration), otherwise borrow
the existing expression from the set. Add conditionals to release
expression iif they represent an override. Use this new override_exprs
flag to dump the dynset expression override to userspace.
This simplifies the existing logic and it also fixes a bug with the
connlimit expression which results in a module refcount imbalance
WARNING splat when resorting on the default set expressions.
Fixes: 65038428b2c6 ("netfilter: nf_tables: allow to specify stateful expression in set definition")
Fixes: fca05d4d61e6 ("netfilter: nft_dynset: honor stateful expressions in set definition")
Reported-by: Xingyuan Mo <hdthky0@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The user can specify any gso_size in a packet crafted with an AF_PACKET
PACKET_VNET_HDR socket, even smaller than TCP_MIN_GSO_SIZE = 8. At the
same time, GSO_MAX_SIZE = 8 * GSO_MAX_SEGS = 8 * 65535. When the user
crafts a packet with gso_size < 8, there is a risk for partial GSO to
overflow the 16-bit gso_segs field when dividing the SKB length by
gso_size.
Adjust gso_size of TCP packets to be at least TCP_MIN_GSO_SIZE = 8. Keep
gso_size of UDP GSO packets, as gso_size=1 is valid and explicitly
tested at tools/testing/selftests/net/tun.c:649.
Fixes: 7c6d2ecbda83 ("net: be more gentle about silly gso requests coming from user")
Signed-off-by: Alice Mikityanska <alice@isovalent.com>
Suggested-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260822120117.1163423-2-alice.kernel@fastmail.im
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull hyperv updates from Wei Liu:
- Decrypt netvsc buffer on contiguous direct-map addresses (Kameron
Carr)
- Drop WS2012/2012R2 & Win8/8.1 Hyper-V support (Michael Kelley)
- Use more meaningful errnos for hypercall status code (Hardik Garg)
- Fix lost interrupts on CPU hot-unplug for Hyper-V PCI/MSI (Naman
Jain)
- Reserve more MSHV vectors for Linux root partition (Wei Liu)
* tag 'hyperv-next-signed-20260826' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
clocksource: hyper-v: Remove support for stimer interrupts in message mode
scsi: storvsc: Remove support for storvsc protocol of old Hyper-V hosts
hv_netvsc: Remove GPADL teardown special case for old Hyper-V hosts
hv_sock: Remove check for old Hyper-V hosts
Drivers: hv: Remove support for WS2012/2012R2 & Win8/8.1 version of Hyper-V
hv_netvsc: Allocate send/receive buffers using vmbus_alloc_buffer()
Drivers: hv: vmbus: Add vmbus_alloc_buffer()/vmbus_free_buffer() for CoCo VMs
Drivers: hv: vmbus: add vmbus_establish_gpadl_caller_decrypted()
Drivers: hv: vmbus: Skip VMBus module cleanup for non-nested root partition
x86/hyperv: reserve more vectors
PCI: hv: Set irq_retrigger callback for the Hyper-V PCI MSI irqchip
Drivers: hv: Use meaningful errnos for hypercall status codes
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Pull NFS client updates from Trond Myklebust:
"Highlights include:
Stable fixes:
- Use-after-free fixes for the sunrpc client code
- Delegation hash table leak
- NULL dereference on lockowner allocation failure
- Fix a handshake completion race in the TLS code
- Fix an error sign checking issue when deciding whether the pNFS
layout is still in use, or can be returned
- Fix a layout segment leak in pnfs_layout_process()
Other bugfixes:
- Fix a missing NULL check in the rpcbind client
- annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
- nfs_inode_set_delegation() error paths should return the delegation
- Use clear_and_wake_up_bit() in nfs_clear_invalid_mapping() and the
pNFS code.
- Fix the nfs4_alloc_client() error paths to free the IDR allocation
- fix folio dereference before NULL check in
nfs_inode_remove_request()
- Fix delayed delegation return
- Fix another state manager race with umount
- Fix device leaks on parse failure
- Avoid cancelling in-flight I/O during a layout recall if the server
doesn't require it
- flexfiles: report cancelled I/O as a layout error
- flexfiles: fix NULL dereference for NFSv4.0 data servers
- Fix incorrect argument passed to nfs4_delete_lease()
- Fix several symlink issues resulting from nfs_atomic_open_v23()
- Fix an uninitialised variable issue in the NFSv4.1 callback code
- fix LAYOUTSTATS send buffer exhaustion
Features and cleanups:
- NFSv4.2: Allow the server to specify that file data may not be cached
- localio: optimise I/O submission when when not doing memory reclaim
- localio: Remove duplicate wait code in nfs_local_commit
- flexfiles: support loosely coupled NFSv4.x data servers
- pNFS: key the data server cache on the NFS version"
* tag 'nfs-for-7.3-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (33 commits)
NFSv4.1: fix layout segment leak on the pnfs_layout_process() forget path
NFSv4/pnfs: key the data server cache on the NFS version
NFSv4.2: fix LAYOUTSTATS send buffer exhaustion
pNFS: Fix EBUSY check in pnfs_layout_need_return
NFSv4.1: zero referring call lists before decoding
nfs: fix ENXIO on O_CREAT open of existing symlink over NFSv3
SUNRPC: wait for in-flight client TLS handshake callback
NFSv4: Fix incorrect argument passed to nfs4_delete_lease() in nfs4_add_lease()
lockd: fix NULL dereference on lockowner allocation failure
NFS: fix delegation_hash_table leak when nfs4_server_common_setup() fails
NFSv4/flexfiles: support loosely coupled data servers
NFSv4/flexfiles: fix NULL dereference for NFSv4.0 data servers
NFSv4: pin the superblock for active state owners
sunrpc: fix use-after-free in __rpc_clnt_handle_event and __rpc_clnt_remove_pipedir
NFS/localio: issue commit inline when not in a memory-reclaim context
NFS/localio: remove dead FLUSH_SYNC handling from nfs_local_commit
NFS/localio: issue IO inline when not in a memory-reclaim context
NFS: Fix delayed delegation return list handling
NFS: Verify symlink inode before caching target
NFS: fix folio dereference before NULL check in nfs_inode_remove_request()
...
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|
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more thermal control updates from Rafael Wysocki:
"This mostly consists of assorted updates of thermal drivers, including
new hardware support (Airoha AN7583, Qualcomm Master BandGap thermal
monitor, QCom PMIC5 Gen3 ADC), but it also includes two reverts of
recent cosmetic thermal core updates that went against driver core
plans to eliminate class_create():
- Fix missing bitfield include headers in Armada and QCom SPM BMG
drivers (Daniel Lezcano)
- Fix missed file when manually applying a change after a conflict
resolution for the QCom SPMI ADC TM5 Gen3 (Daniel Lezcano)
- Move thermal_zone_device_enable() to the right place in order to
prevent calling it if the thermal zone registration failed (Dan
Carpenter)
- Improve bitfield manipulations on Armada (Bryan B. Lima)
- Remove unneeded 'fast_io' on Sun8i and Armada (Wolfram Sang)
- Fix wrong boundary when clamping the low values in the set_trips()
callback and fix wrong mask when setting the temperature interval
on Airoha (Christian Marangi)
- Make use of the regmap API to support Airoha AN7583 (Christian
Marangi)
- Fix adc_tm5_get_temp() return check value on the QCom SPMI ADC
sensor (Rakesh Kota)
- Fix unbalanced clock enablement when the resume fails on the iMX
driver (Can Peng)
- Add Qualcomm Master BandGap thermal monitor support (Satya Priya
Kakitapalli)
- Add Maili Temperature bindings compatible (Haritha S K)
- Add a devm action to clean hardware interrupts, sampling, and
control registers on Spacemit K1 (Pei Xiao)
- Fix trivial typo in a thermal OF code comment (Marek Vasut)
- Remove unnecessary print on Qcom SPMI ADC driver when a call to
devm_request_threaded_irq() fails as this one already prints a
message (Jishnu Prakash)
- Add support for QCom PMIC5 Gen3 ADC by using auxiliary driver and
shared interrupt with the IIO driver (Jishnu Prakash)
- Make resets optional on MT8196 and add the corresponding property
in the DT bindings (AngeloGioacchino Del Regno)
- Fix clock staying enabled on failing resume operation on Qoriq (Can
Peng)
- Fix wrong closing brace position in thermal library header (Andreas
Haufler)
- Fix low and high trip point validation by moving the check after
the clamp on the spacemit driver (surendra)
- Remove redundant error messages on IRQ request failure (Pan Chuang)
- Add IIO_CONSUMER namespace import to the qcom-spmi-mbg-tm thermal
driver to avoid modpost warnings that would appear after merging
the iio tree against the thermal updates (Nathan Chancellor)
- Revert two recent cosmetic updates of the thermal core conflicting
with driver core plans to eliminate class_create() (Rafael
Wysocki)"
* tag 'thermal-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
thermal/drivers/qcom-spmi-mbg-tm: Add module namespace import for IIO_CONSUMER
Revert "thermal/core: Allocate the thermal class dynamically"
Revert "thermal/core: Use the thermal class pointer as init guard"
thermal/drivers/armada: Fix missing bitfields include
thermal/drivers/qcom/spm mbg tm: Fix missing bitfield header
thermal/drivers/qcom: Fix missing spmi adc tm5 gen3 file
thermal/drivers: Remove redundant error messages on IRQ request failure
thermal/drivers/spacemit: Validate clamped trip thresholds
tools/lib/thermal: Fix misplaced extern "C" closing brace
thermal/drivers/qoriq: Disable clock on resume failure
thermal/drivers/mediatek/lvts_thermal: Make reset optional for MT8196
dt-bindings: thermal: mediatek: Make resets optional for MT8196
thermal/drivers/qcom: add support for PMIC5 Gen3 ADC thermal monitoring
iio: adc: qcom-spmi-adc5-gen3: Share SDAM0 IRQ with ADC_TM auxiliary driver
iio: adc: qcom-spmi-adc5-gen3: Remove an unnecessary print
thermal/of: Fix trivial enabled typo
thermal/drivers/spacemit/k1: Add shutdown action and reorder registration order
dt-bindings: thermal: qcom-tsens: Document the Maili Temperature Sensor
thermal/drivers/qcom: Add support for Qualcomm MBG thermal monitoring
dt-bindings: thermal: Add Qualcomm MBG thermal monitor support
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI support updates from Rafael Wysocki:
"These update documentation to reflect recent changes in the upstream
ACPICA project, fix issues in the core ACPI device enumeration code
(one of which has been introduced recently), improve the primary
"physical" device lookup for ACPI device objects in that code, and
update ACPI device drivers:
- Update MAINTAINERS, CREDITS and ACPI subsystem documentation to
reflect recent changes in the upstream ACPICA project (Rafael
Wysocki)
- Prevent the core ACPI enumeration code from combining device
resources that overlap completely in order to avoid resource
conflicts during platform device registration because there are
drivers that expect such resources to be present (Rafael Wysocki)
- Defer device power initialization during ACPI-based device
enumeration to the point when the given device is known to be
present and functional and all of its dependencies have been met
(Peixin Xie)
- Fix bus ID cleanup on device_add() failures during ACPI device
object registration (Hongyan Xu)
- Introduce a new helper function for looking up the primary
"physical" device for a given ACPI device object and update the
core ACPI device enumeration code to use that function (Rafael
Wysocki)
- Protect all battery properties with a separated mutex in the ACPI
battery driver to prevent race conditions from occurring and avoid
evaluating the _BST ACPI control method multiple times in parallel
for the same battery device (Rong Zhang)
- Add DMI quirk for the Razer Blade Pro 17 early 2020 lid switch to
the ACPI button driver (Robin Everaars)
- Convert fixed clock rates in the ACPI driver for AMD SoCs (APD) to
use HZ_PER_MHZ and add a clock frequency for the HJMC01 I2C
controller to it (Hongnan Li and Xiangyang Yu)
- Fix a stack buffer overflow in query_capability() in the ACPI
platform firmware runtime update driver (Anirudh Prasad)"
* tag 'acpi-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: button: Add DMI quirk for Razer Blade Pro 17 early 2020 lid switch
ACPI: scan: Do not combine resources that overlap completely
ACPI: Update upstream ACPICA repository URL in documentation
ACPI: Update MAINTAINERS entry for ACPICA
ACPI: Add Bob Moore to CREDITS
ACPI: pfr_update: fix stack buffer overflow in query_capability()
ACPI: scan: Defer device power initialization
ACPI: APD: Add clock frequency for HJMC01 I2C controller
ACPI: APD: Convert fixed clock rates to use HZ_PER_MHZ
ACPI: scan: Use acpi_bus_get_primary_device()
ACPI: platform: Use acpi_bus_get_primary_device()
ACPI: bus: Introduce acpi_bus_get_primary_device()
ACPI: scan: fix bus ID cleanup on device_add() failures
ACPI: battery: Protect all properties with a separated mutex
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk updates from Stephen Boyd:
"Mostly the usual clk driver updates and new SoC additions plus
non-critical data fixes for things that weren't used yet.
One thing that's new here in the core is SSC spread spectrum support
(SSC) in the clk provider API. The idea is that DT authors will
configure SSC for certain clks and they'll be configured at clk
provider registration time or when a consumer device is probed,
similar to how we handle assigned clk rates or parents.
On the clk driver side we have Qualcomm adding almost half the diff
because they add support for 4 different SoCs and then a long tail of
other SoCs like Mediatek, Renesas, Rockchip, SpaceMiT, etc. add more
SoC support this time around. Luckily it's mostly clk data for these
new SoCs because the actual clk_ops are already there. Beyond the new
drivers we get all the little fixups for more compilation coverage or
usage of more modern APIs. That all looks normal.
Finally, I kinda buried the lede, I'm bringing on Brian and Jerome to
help out with maintaining the clk subsystem. The current working model
is already semi-distributed in that silicon vendors typically take
care of their drivers and send me pull requests but I'm becoming a
bottleneck for new drivers and core framework review because this has
become a 100% volunteer effort on my part.
Mike is stepping down after all these years (thanks Mike!) and that
jump started the conversation around finding co-maintainers. Brian and
Jerome have graciously offered to help me with the work load, meaning
in the future they'll be sending pull requests and committing directly
to the clk.git tree. They've both been around on the list for a while,
I've met them both in person, and they've been making changes to the
core clk framework along with helping review patches so I'm pretty
confident this will work well.
Core:
- devm_clk_bulk_get_enable() consumer API
- devm_clk_hw_register_composite_pdata() provider API
- Spread Spectrum Clock (SSC) support via DT bindings and provider APIs
- Divider clk rounding improved (and tested)
New Drivers:
- Cix Sky1 audio subsystem (AUDSS)
- UltraRISC DP1000
- MediaTek MT8173 MFG_TOP
- Si549
- Aspeed AST2700 PECI
- Airoha EN7523 PCIe
- Rockchip RV1106
- Mobileye EyeQ7H
- Qualcomm Maili GCC, TCSR, RPMh, and video clks
- Qualcomm Shikra GCC, RPM, GPU, display, and audio clks
- Qualcomm Nord display and graphics clks
- Qualcomm Glymur camera and EVA clks
- Qualcomm Hawi video clks
- Amlogic A9 AO and peripheral clks
- Renesas R-Car X5H (R8A78000) CPG"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (269 commits)
clk: microchip: mpfs: fix regmap_update_bits() mask/val order
clk: visconti: Make sure clk_init_data is fully initialized
clk: ti: Make sure clk_init_data is fully initialized
MAINTAINERS: Add Brian Masney and Jerome Brunet as co-maintainers for clk subsystem
Drop Michael Turquette's clk maintainer entry
clk: ti: composite: resolve parent clocks by DT index, not by name
clk: ti: mux: resolve parent clocks by DT index, not by name
clk: devres: fix cleanup in devm_clk_get_optional_enabled_with_rate()
dt-bindings: clock: ti,keystone-gate: Convert to DT schema
dt-bindings: clock: ti: Convert APLL clock to DT schema
clk: zynq: pll: Fix kernel-doc after determine_rate() conversion
dt-bindings: clock: ti,clockdomain: Convert to DT schema
dt-bindings: clock: Correct white-space style
clk: samsung: Don't include <linux/mod_devicetable.h>
clk: at91: Read "reg" with helper
clk: renesas: Add R-Car X5H CPG driver
clk: rockchip: rk3576: fix source muxes for SPI0..SPI4
clk: rockchip: Add clock controller for the RV1106
dt-bindings: clock: rockchip: Add RV1106 CRU support
dt-bindings: clock: Document Renesas R-Car X5H Clock Pulse Generator
...
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Merge changes related to primary "physical" device lookup for a given
ACPI device object that include the introduction of a new lookup helper
function and core ACPI device enumeration code updates putting that new
function to use (Rafael Wysocki)
* acpi-bus:
ACPI: scan: Use acpi_bus_get_primary_device()
ACPI: platform: Use acpi_bus_get_primary_device()
ACPI: bus: Introduce acpi_bus_get_primary_device()
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git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull another power sequencing update from Bartosz Golaszewski:
"A single tree-wide rename of two of the public functions to better
reflect their actual semantics:
- rename pwrseq_power_on/off() to pwrseq_enable/disable() tree-wide"
* tag 'pwrseq-updates-for-v7.3-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
power: sequencing: rename pwrseq_power_on/off() to pwrseq_enable/disable()
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The way power sequencing works means that a call to pwrseq_power_on()
does not necessarily result in the pwrseq target being powered-on at
that time: it may have already been powered on before. Similarly: a call
to pwrseq_power_off() does not have to result in an actual powering off
of resources: there may still be other users that requested a power-on
before.
We will also introduce the concept of "non-controllable" pwrseq targets
soon which further increases the disconnect between the naming
convention and the actual semantics.
What consumers of pwrseq descriptors actually do is: they *vote* for a
powering on of a given target or retract that vote. These operations
could be called get/put in line with runtime PM but this could become
confusing since we already provide pwrseq_get/put() for a different
purpose. pwrseq_vote_on/off() also have been rejected as unusual in
the tree.
Change the name of the two functions to pwrseq_enable/disable() which
better reflects their purpose and semantics and also mirrors other
enable-counted resources like regulators and clocks. No functional change
intended.
If at any point users need to know *when* the exact power event happens,
we can provide that information in the form of a notifier.
Acked-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Acked-by: Alessio Belle <alessio.belle@imgtec.com> # imagination
Link: https://patch.msgid.link/20260731-pwrseq-vote-rename-v3-1-44e60b8be053@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
Pull remoteproc updates from Bjorn Andersson:
"Add a remoteproc driver and binding for AMD MicroBlaze/V soft cores
executing from dual-port BRAM, with clock and reset control and
support for firmware without a resource table.
Introduce a generic Qualcomm PAS service with SCM and OP-TEE backends,
and migrate the PAS, MSS, and WCNSS remoteproc drivers to it. Add Nord
ADSP and CDSP support, Eliza CDSP support, Maili ADSP/CDSP bindings,
and late-attach SoCCP support for Kaanapali, Hawi, Maili, and Glymur.
Enable BAM-DMUX child devices for PAS modems and fix PAS memory
protection, handover, shutdown, and resource lifetime handling.
Harden remoteproc lifecycle handling by attaching asynchronously,
stopping crashed processors, synchronizing crash work with removal,
and forcing shutdown before device resources are released. Reallocate
resources during attach recovery and fix several reference and
error-path leaks.
Add Xilinx R5 crash detection and move RPU start and stop sequencing
into the platform firmware driver. Consolidate write-combining
carveout mapping callbacks, use correct I/O-memory accessors, and
share optional ELF resource-table handling across drivers.
Convert the TI Wakeup M3 binding to DT schema, correct Qualcomm and
generic remoteproc bindings, and harden resource-table iteration
against signed-offset out-of-bounds accesses"
* tag 'rproc-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux: (60 commits)
remoteproc: fix OOB read via signed offset in rsc_table_for_each_entry()
remoteproc: replace BSD blurb with SPDX identifier in rsc_table.h
remoteproc: replace BSD blurb with SPDX identifier in remoteproc.h
remoteproc: fix coding style issues in remoteproc.h
MAINTAINERS: add rsc_table.h to remoteproc entry
remoteproc: qcom: pas: Add Nord ADSP and CDSP support
dt-bindings: remoteproc: qcom,nord-pas: Document Nord PAS
remoteproc: qcom: pas: Drop unused dtb_mem_region field
remoteproc: qcom: pas: Map/unmap subsystem region before auth_and_reset
remoteproc: qcom: pas: Fix the PAS context creation placement
remoteproc: qcom: pas: Guard dtb metadata release with dtb_pas_id check
remoteproc: qcom: annotate mem_region fields with __iomem
arm64: dts: qcom: eliza: Add fallback compatible for ADSP remoteproc
dt-bindings: remoteproc: qcom,milos-pas: Move Eliza ADSP to SM8550 schema
remoteproc: qcom: pas: Add Eliza CDSP support
dt-bindings: remoteproc: qcom,sm8550-pas: Add Eliza CDSP compatible
remoteproc: qcom: q6v5: Request shutdown if crash is triggered host-side
remoteproc: Force shutdown during device removal
remoteproc: Prevent crash handling to race with rproc_del()
remoteproc: Allow shutdown of crashed processors
...
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Pull kvm updates from Paolo Bonzini:
"ARM64:
- Add support for 'slot' based PMU events, paired with new UAPI that
compels the user to select a specific PMU implementation
- Lazy save/restore of vCPU state for pKVM, along with various fixes
and cleanups to the management of vCPU state between the untrusted
host and pKVM hypervisor
- Disable traps of EL1 registers for nested hypervisors when
FEAT_NV2p1 is present, guaranteeing that EL2-specific register bits
are stateful in the EL1 counterpart
- Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the
scope of those instructions remains 'in host' (i.e. L1
kernel/userspace)
- Pile of fixes for the management of the VNCR pseudo-TLB, such as
under-invalidations and races with concurrent TLBIs on other vCPUs
- Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
runtime-patched constant, allowing the same data to be shared with
pKVM prior to dropping host privileges
- Considerable pile of LLM-assisted fixes around the shop but mostly
in the VGIC, our in-kernel generator of bugs (and sometimes
interrupts)
LoongArch:
- Advertise already-supported capabilities
- Some bug fixes about timer and MMIO
- Some hardening about interrupt injection
- Replace kvm_err() with kvm_pr_unimpl()
- Add FPU/LSX/LASX test cases for selftests
RISC-V:
- Svadu/Zicfiss/Zicfilp FWFT support for Guest
- Use try_cmpxchg for IMSIC MRIF RMW
- More arch-specific tracepoints in KVM RISC-V
- Eager page splitting when enabling dirty logging
- Optimize hfence request handling for SMP Guests
- Improve dirty log clearing by skipping zero bits in mask
- Guard HFENCE range loops against overflow
- CPU PM notifiers in KVM RISC-V for non-retentive idle states
- Fix kernel-mode vector context save/restore for Guest
s390:
- Fixes for vfio-ap
- Fixes for the gmap rework
- Fixes for vsie
- AI triggered fixes all over
- diag9c tracing
- code move preparation for the additional arm64 support
- enable CONTEXT_ANALYSIS
x86:
- Perform spring cleaning on x86.{c,h} and asm/kvm_host.h, by adding
regs.c (the kvm_cache_regs.h => regs.h is already applied) and
msrs.{c,h}, and moving relevant code out of x86.c
- Split kvm_mmu in three parts, respectively to describe the format
of page tables, walking the guest page tables and building the page
tables. Always use the same page table walker kvm->arch.gva_walk as
the entry point to convert a guest's virtual address, where the
previous code used two different kvm_mmu structs depending on
whether the walk included nested EPT/NPT or not. Make page fault
vmexits reuse the permission checking machinery that is used for
guest page faults. This is both a cleanup and a baby step towards
supporting XS/XU memory permissions
- Document some of the "fun" gotchas with the APIC base when creating
IRQCHIPs on x86
- Remove a defunct masterclock update from kvm_xen_shared_info_init().
It could result in incorrect kvmclock due to triggering an
unnecessary switch to/from masterclock mode
- Skip Xen runstate time updates if time has effectively gone
backwards, so that the guest doesn't report 100% steal time for
a very, very long time
- Drop KVM's runtime updates of the Xen PV timing CPUID leaf, as KVM
was updating the wrong sub-leaf, and upstream KVM will soon provide
all the information needed by userspace to populate the CPUID field
itself
- Fix a bug where KVM would walk a newly created rmap without holding
the rmap lock (or mmu_lock) during aging
- Fix a bug where aging TDP MMU SPTEs could clobber FROZEN SPTEs
- Fix a variety of #DB priority bugs
- Fix a class of races related to enabling Hyper-V emulation on a
vCPU after the vCPU is visible to the rest of KVM
- Use static calls for nested virtualization ops
- Move more KVM-internal code out of x86's kvm_host.h
- Enumerate support for a variety of Zhaoxin instructions that don't
require explicit virtualization
- Fix missing EFER validation bugs, including in the KVM_SET_SREGS*
path
- Harden kvm_vcpu_map() against double-mapping and thus leaking
references
- Misc fixes and cleanups, e.g. for largely benign syzkaller splats
x86 (Intel):
- Zero a vCPU's entry in VMX's Posted Interrupt Descriptor table used
for IPI virtualization when the vCPU is freed, to fix a
use-after-free where hardware will write to a freed vCPU's PID
- Service local TLB flushes on a failed nested VM-Enter to fix a bug
where KVM could miss a TLB on a future, successful VM-Enter with
the same L2 VPID
- Cap the maximum value shoved into the VMX Preemption Timer to
workaround an erratum that affects all existing Intel CPUs that
support CPUID 0x15
- Fix VPID virtualization bugs where KVM would fail to flush hardware
TLBs
- Harden the TDX "populate" ioctls against bad input, and to prepare
for supporting in-place private<=>shared conversion
x86 (AMD):
- Forcefully invalidate SNP VMSA pages if their backing guest_memfd
page is zapped/invalidated, e.g. due to a PUNCH_HOLE in response to
a Page-State Change request
- Remove a dying VM from the GA Log notifier list before the VM is
actually destroyed, to fix a potential use-after-free
- While FOLL_WRITE was needed in the past to trigger CoW unsharing,
nowadays FOLL_LONGTERM does that already even without FOLL_WRITE,
and in fact, get_user_pages() actually disallows FOLL_WRITE
together with FOLL_LONGTERM. So don't pass FOLL_WRITE when
registering encrypted memory regions, i.e. when pinning SEV/SEV-ES
guest memory, to fix a regression with file-backed memory
introduced by KVM's (correct) usage of long-term pins
(This was reviewed by mm maintainers; for more information, see
commit ee1a586dd1fa "KVM: SEV: Drop FOLL_WRITE for encrypted region
registration")
- Allocate full pages for SEV/SEV-ES {DE,EN}CRYPT ops on SNP-enabled
hosts to fix a data corruption issue due to the PSP driver
assigning to-be-written pages to firmware (as required by the SNP
specs)
- Unconditionally intercept ICBEP so that KVM generates the correct
guest RIP when handling an ICEBP-induced TASK_SWITCH #VMEXIT
- Harden the SNP "populate" ioctls against bad input, and to prepare
for supporting in-place private<=>shared conversion
Generic:
- Remove kvm_debugfs_dir if kvm_init() fails after creating KVM's
debugfs
- Add a per-VM bitmap to track which vCPU IDs have been "claimed" but
for which the vCPU isn't yet online, and use the bitmap to reject
duplicate IDs before calling into arch code. This allows arch code
to consume vcpu_id without having to worry about cross-vCPU
clobbering (at least s390 and x86 have had related bugs)
- Rework the so called "prepare" and "invalidate" guest_memfd hooks
to prepare for in-place private<=>shared conversion, and clean up a
few warts along the way
Selftests:
- Automatically allocate a full page for L2 guest stacks on x86
instead of requiring test-specific L1 guest code to carve out a
portion of the L1 stack for L2 usage, and to ensure the L2 stack
also adheres to the x86-64 calling convention ABI
- Add a selftest to verify {Guest,Host}-Only behavior in x86's
mediated PMU
- Clean up nested SVM's handling of GPRs on L2<=>L1 transitions,
reuse the functionality for nested VMX, and drop the ucall hack
that was fudging around the lack of GPR switching on nVMX
- Add a stress test to verify KVM doesn't clobber/drop #PF state,
e.g. CR2, across save/restore, including when L2 is active
- Add a test to verify KVM_CREATE_VM accepts exactly what is reported
by KVM_CAP_VM_TYPES
- Misc selftests fixes and cleanups
- Fix several issues with seeding the pRNG, and rework the pRNG APIs
to that the pRNG can be sanely used in host code, not just guest
code
- Add an IRQ test to validate virtual IRQ deliverty for IRQs wired up
via KVM_IRQFD + KVM_SET_GSI_ROUTING, with optional support for
triggering IRQs via writes to an assigned VFIO device
- Add syscall wrappers to assert success on a variety of pthreads and
CPU affinity APIs
- Set vCPU pthread affinity as early as possible to reduce contention
issues that were surfaced by PREEMPT_LAZY, which result in runtimes
of over a minute on large hosts, versus the expected ~5 seconds
- Rework the PMU counters test to run each testcase using a single VM
with many vCPUs for each sub-testcase, instead of using a unique VM
for each sub-testcase. This cuts the runtime by ~20x
Miscellaneous:
- MAINTAINERS updates for vfio-ap, guest_memfd, kvm-x86. Mostly
representing the status quo more accurately, but also... welcome
David Hildenbrand as guest_memfd reviewer!"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (413 commits)
KVM: arm64: Validate GICv5 timer PPIs before claiming ownership
KVM: arm64: vgic: Reject out-of-range GICv5 PPI IDs
KVM: arm64: vgic: Prevent speculative SPI array underflow
KVM: arm64: vgic: Free gic_kvm_info on initialization failure
KVM: arm64: Avoid mismatched accesses to 'struct kvm_nvhe_init_params'
s390/vfio-ap: Fix NULL deref in status_show() during queue probe
s390/vfio-ap: Fix hot-unplug skipped when last AP adapter or domain removed
s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap
s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove
s390/vfio-ap: Fix required lock not held during update of ap_matrix_mdev object
s390/vfio-ap: Fix missing lock required to access list of ap_matrix_mdev objects
s390/vfio-ap: Fix dereference matrix_mdev->kvm without checking for NULL
s390/vfio-ap: Fix stale do_remove flag across iterations in vfio_ap_mdev_cfg_remove
RISC-V: KVM: fix vcpu vector context handling for kernel-mode vector
riscv: vector: allow non-preemptible kernel-mode vector with IRQs off
riscv: vector: refactor riscv_v_start_kernel_context
KVM: s390: gmap: Make prefix handling optional
KVM: s390: gmap: Make CMMA optional
KVM: s390: gmap: Make storage keys optional
KVM: s390: Prepare gmap for a second KVM implementation
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY / serial driver updates from Greg KH:
"Here is the "big" set of tty and serial driver updates for 7.3-rc1.
Not really all that much happened this development cycle for this
subsystem, changes in here are:
- removal of the ipwireless driver as it's no longer used or needed
- new 8250_mxpcie driver added
- qcom serial driver updates and additions
- vt mode validation addition
- lots of other small serial driver updates and additions
All of these have been in linux-next for weeks with no reported issues"
* tag 'tty-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (97 commits)
serial: imx: serialize imx_uart_ports[] lifetime
tty: clear cdev pointer after cdev_add() failure
tty: skip cdev_del() when no cdev is registered
serial: core: clear freed pointers on uart_register_driver() failure
serial: core: do fallible allocations before the console can be registered
serial: 8250_mxpcie: implement rx_trig_bytes callbacks via MUEx50 RTL
serial: 8250_mxpcie: introduce per-port private data structure
serial: 8250: allow UART drivers to override rx_trig_bytes handling
serial: 8250_mxpcie: add break support for RS485 using MUEx50 features
serial: 8250: allow low-level drivers to override break control
serial: 8250_mxpcie: support serial interface mode switching
serial: 8250_mxpcie: speed up TX using memory-mapped FIFO window
serial: 8250_mxpcie: speed up RX using memory-mapped FIFO window
serial: 8250_mxpcie: add custom handle_irq callback
serial: 8250_mxpcie: offload XON/XOFF flow control to MUEx50 hardware
serial: 8250_mxpcie: enable automatic RTS/CTS flow control
serial: 8250_mxpcie: enable enhanced mode and program FIFO trigger levels
serial: 8250: add Moxa MUEx50 UART port type
serial: 8250: split Moxa PCIe serial board support out of 8250_pci
serial: qcom-geni: Use geni_se_set_perf_level() for baud rate perf level
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / Thunderbolt updates from Greg KH:
"Here is the big set of USB and Thunderbolt driver updates for 7.3-rc1.
Lots of driver work for new devices and systems, and many other minor
fixes and updates. Included in here are:
- Thunderbolt subsystem driver updates and additions
- typec driver updates and additions
- usb gadget fixes all over the place, seems like people are finally
paying attention to these drivers for some reason
- xhci driver updates and fixes based on lots of reports
- usb-serial driver updates and additions
- new device ids
- other minor USB driver updates and fixes
All of these have been in linux-next for a while with no reported issues"
* tag 'usb-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (163 commits)
usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()
usb: typec: hd3ss3220: fix VBUS regulator error message
usb: usbfs: fix use-after-free of usb_device in usbdev_release()
usb: gadget: u_audio: Fix use-after-free on sound card disconnect
usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition
usb: gadget: f_tcm: keep port count until LUN teardown completes
usb: usbtest: disable dynamic ID support
usb: typec: tcpci: pass correct rx_type to tcpm_pd_receive()
USB: c67x00: fix use-after-free in c67x00_add_iso_urb()
usb: typec: ucsi: use UCSI_TIMEOUT_MS for sync command completion
usb: gadget: snps_udc_plat: clean up PHY on probe deferral
usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()
usb: dwc2: gadget: Exit partial power down state when changing USB pull-up
usb: gadget: f_fs: Fix Use-After-Free in AIO error path
usb: gadget: f_fs: Prevent deadlock during ep0 read loop
usb: gadget: at91_udc: drain polled-VBUS timer/work before udc is freed
usb: gadget: midi2: remove default configfs groups on teardown
usb: gadget: uvc: Fix null pointer dereference in uvcg_video_init()
usb: typec: thunderbolt: Disable work before freeing tbt on remove
usb: xhci: Handle bogus TRB pointers in Missed Service Error events
...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/IIO/etc driver updates from Greg KH:
"Here is the big set of char, misc, iio, counter, fpga, and other small
driver subsystems for 7.3-rc1.
Overall, due to some driver removals we only added a bit more code
than removed, which was a nice change. Highlights in this merge
request are:
- Loads of IIO driver updates and additions
- binder driver updates (more on that below...)
- Removal of the SGI XP and GRU drivers as they are not used anymore
and turn out to be pretty insecure overall
- Removal of the obsolete ibmasm driver as it's not being used
anymore
- Coresight driver updates and additions
- Mei driver udpates
- Counter driver updates
- FPGA driver updates
- ICC driver updates
- lots and lots of other tiny driver updates to resolve reported
issues
All of these have been in linux-next for a while"
* tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (513 commits)
iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF
iio: adc: pac1921: fix wrong channel used in trigger handler read
iio: light: gp2ap002: re-enable irq if runtime suspend fails
iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
iio: light: apds9306: fix PM reference leak in apds9306_read_data()
iio: gyro: mpu3050: fix sign of raw angular velocity readings
iio: srf04: fix pm_runtime handling on probe error path
iio: adc: ad4080: configure backend data size
iio: adc: adi-axi-adc: add data size support for AD408X backend
iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable
iio: dac: ad5446: fix OF module device table
iio: light: opt4001: Fix reversed GENMASK() arguments in fault count mask
iio: light: opt4001: Reject integration times with a non-zero seconds part
iio: light: opt4001: Fix incompatible pointer type passed to div_u64_rem()
iio: light: opt4001: Fix power down clearing bits of the wrong register
iio: light: opt4060: Fix incorrect register name in threshold read error message
iio: light: opt4060: Fix pointer type passed to div_u64_rem()
iio: light: opt4060: Reject integration times with a non-zero seconds part
iio: light: ltrf216a: fix runtime PM reference leak in error path
iio: pressure: dps310: fix NULL pointer dereference on ACPI probe
...
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull bootconfig updates from Masami Hiramatsu:
- Support build-time command line building for embedded bootconfig
- Fix xbc_snprint_cmdline() to render descendant keys when the root has
both a value and subkeys, and treats empty subtrees correctly.
- Add build-time pipeline using tools/bootconfig -C to render the
embedded bootconfig "kernel" subtree into .init.rodata as a cmdline
string.
- Clean build-time tools/bootconfig from make clean
- Add helper to prepend embedded bootconfig cmdline into
boot_command_line early before parse_early_param()
- Wire early prepend helper in x86 setup_arch() so early_param handlers
see values from the embedded bootconfig (currently x86 only)
- Avoid duplicating "kernel" keys in setup_boot_config()
- Refactor setup_boot_config() to share bootconfig_cmdline_requested()
- Document CONFIG_CMDLINE_FROM_BOOTCONFIG usage, requirements, and
precedence
* tag 'bootconfig-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
init/main.c: use bootconfig_cmdline_requested() for the runtime opt-in
bootconfig: skip runtime kernel.* render once prepended early
x86/setup: prepend embedded bootconfig cmdline before parse_early_param
Documentation: bootconfig: document build-time cmdline rendering
bootconfig: add xbc_prepend_embedded_cmdline() helper
bootconfig: clean build-time tools/bootconfig from make clean
bootconfig: render embedded bootconfig as a kernel cmdline at build time
bootconfig: render descendant keys when xbc_snprint_cmdline() root has a value
|
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse updates from Miklos Szeredi:
- Improve performance of the io-uring transport by introducing buffer
pools and zero-copy (Joanne)
- Fix lots of bugs (Baokun Li)
- Fix io-uring initialization issues (Joanne, Bernd)
- More prep work for large folios (Joanne)
- Don't limit buffered read to 128k (Jim Harris)
- Fix zeroing of page end (dirtied with mmap) on file size extension
(Jimmy Zuber)
- Improve performance in certain cases with wake_up_sync() when queuing
request (Xuewen Yan)
- Misc fixes and cleanups (Xuewen Yan)
* tag 'fuse-update-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: (35 commits)
fuse: zero the partial EOF page when extending a file
io_uring: Add missing include for ITER_SOURCE and ITER_DEST
fuse: Fix the condition to enable over-io-uring
fuse: invalidate the correct range after O_APPEND direct write
selftests/fuse: test post-EOF page zeroing when a file is extended
fuse: wake one waiter per freed slot when raising max_background
fuse: use min_not_zero() in fuse_init_server_timeout()
fuse: copy request headers via a stack buffer for io-uring
fuse: give wakeup hints to the scheduler for synchronous requests
fuse: check for NULL root inode in fuse_fill_super_submount
fuse: reject a duplicate fd= mount option
cuse: wait for pending RCU callbacks on module exit
fuse: fix invalidate lock leak on open O_TRUNC DAX failure
fuse: fix invalidate lock leak on setattr writeback failure
fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
fuse: make dentry_tree_work static
docs: fuse: document io-uring buffer pool and zero-copy uapi
fuse: add zero-copy over io-uring
fuse: support registered buffer pools in io-uring
fuse: add io-uring buffer pools
...
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A cached RECONF chunk may contain more than one request parameter. A
duplicate response can therefore find and process the same ADD_OUT request
again while another parameter is still outstanding, rolling back outcnt
twice and possibly underflowing it.
Track outstanding request types as bits and clear each bit after its first
response. Later responses for the same request are then ignored.
Fixes: 11ae76e67a17 ("sctp: implement receiver-side procedures for the Reconf Response Parameter")
Cc: stable@kernel.org
Reported-by: TencentOS Corvus AI <corvus@tencent.com>
Link: https://lore.kernel.org/netdev/20260730110225.37371-1-juny24602@gmail.com/
Suggested-by: Xin Long <lucien.xin@gmail.com>
Assisted-by: tencentos-corvus-ai:kimi-k3
Signed-off-by: Jun Yang <junvyyang@tencent.com>
Link: https://patch.msgid.link/20260824081832.98717-3-juny24602@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
The mas_prev_range() function takes a min and not a max.
Link: https://lore.kernel.org/20260821192627.4085470-18-liam@infradead.org
Fixes: 6b9e93e01020 ("maple_tree: add mas_prev_range() and mas_find_range_rev interface")
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Joe Perches <joe@perches.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
Failures to remove entries using the two APIs to erase the entries may
result in allocation failures. The failures may go unnoticed and an
unexpected entry may remain. Instead, fall back to retrying with
GFP_KERNEL | __GFP_NOFAIL so that the entry will be removed.
Link: https://lore.kernel.org/20260821192627.4085470-15-liam@infradead.org
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Joe Perches <joe@perches.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
MAPLE_ALLOC_SLOTS is no longer used, so remove it.
Link: https://lore.kernel.org/20260821192627.4085470-7-liam@infradead.org
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Joe Perches <joe@perches.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
Use the lockdep sequence numbers to ensure the write lock is not dropped
between write operations. The lockdep sequence is recorded on any walk
that starts from the top of the tree and re-checked prior to any operation
using an active node.
When lockdep detects an issue, it sets debug_locks to 0 disabling further
reports. __lock_sequnece() will return u32 ~0 when debug_locks is zero,
and the real sequnece count cannot return such a high value as it is less
than 32bits.
By always updating the sequence number, regardless of lock state and by
ignoring ~0 value in the sequence number will avoid ever printing a
WARN_ON when lockdep sets debug_locks to 0.
Link: https://lore.kernel.org/20260821192627.4085470-4-liam@infradead.org
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Cc: Breno Leitao <leitao@debian.org>
Tested-by: Breno Leitao <leitao@debian.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Joe Perches <joe@perches.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
Add an 8 bit small sequence counter to the held_lock struct to detect if
the lock as been dropped and reacquired. This is useful when a data
structure depends on a constant locking context, but is not able to detect
locking and unlocking of the lock through its own API.
Since the __lock_unpin_lock() will no longer detect underflow by casting
the unsigned int to a signed int, update the casting code to use a temp
variable for calculations using a signed int.
Link: https://lore.kernel.org/20260821192627.4085470-3-liam@infradead.org
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Waiman Long <longman@redhat.com>
Link: https://lore.kernel.org/all/h3tpnj5kzcrxms5picmimtkpg4aypcpip5wbd6bt2rpdj5k7eb@nhtzs3lefrkq/
Cc: Breno Leitao <leitao@debian.org>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Joe Perches <joe@perches.com>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
Patch series "maple_tree: lock checking and clean ups", v3.
In this series:
1. Try to detect lock issues
A number of syzbot reports are incorrectly pointing to the mm exit as
a source of the locking error. The first three patches attempt to
help users detect errors in their locking - but they still have to use
LOCKDEP. I guess it's still down to hope and prayers.
2. Documentation fixes
The documentation was lacking clarity, there are updates to try and
help the users, especially around the erase() cases.
3. Two benign issues
The cyclic allocator may have a race, although no in-kernel user can
hit it.
The erase functions may cause allocation issues if used with the
incorrect locking type, but none are present in-tree.
4. The erase gfp uses
mas_erase() and mtree_erase() do not take a gfp argument. To improve
reliability of the erase, the first attempt to allocate will be
GFP_NOWAIT, followed by a retry (if necessary of GFP_KERNEL |
GFP_NOFAIL. This will ensure the data is gone. I've updated the
documentation to make it more clear as well. mas_store() is not
addressed in the same way, but may need to be updated at a later date,
but that may require changing callers so it is out of scope here.
Beyond these goals there are some test fixes, some general speed-up
patches targeting extra work and cycles, and dropping dead code.
This patch (of 19):
When CONFIG_LOCKDEP and CONFIG_RCU_STRICT_GRACE_PERIOD is enabled, check
for rcu locking issues by recording the grace period in the maple state
and checking the rcu window is still valid whenever the maple state is
reused with a state that is not MA_START or MA_PAUSED.
Link: https://lore.kernel.org/20260821192627.4085470-1-liam@infradead.org
Link: https://lore.kernel.org/20260821192627.4085470-2-liam@infradead.org
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Joe Perches <joe@perches.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
swapops.h uses MAX_SWAPFILES_SHIFT, SWP_MIGRATION_READ and SWP_PTE_MARKER,
all of which swap.h defines, but does not include swap.h. It compiles only
where the translation unit pulled swap.h in first. leafops.h includes
swapops.h on the line above swap.h, so a file whose include list reaches
leafops.h before swap.h gets:
In file included from include/linux/leafops.h:11:
include/linux/swapops.h:88:21: error: use of undeclared
identifier 'MAX_SWAPFILES_SHIFT'
A header that uses a definition has to include the header that provides it.
Link: https://lore.kernel.org/20260818115026.656406-1-kirill@shutemov.name
Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202608181757.mza9RRj7-lkp@intel.com/
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Barry Song <baohua@kernel.org>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
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Moving v1 userspace eventfd handling into memcontrol-v1.c shrank struct
vmpressure from 112 to 24 bytes when CONFIG_MEMCG_V1 is disabled. This
moved memory_events_local[MEMCG_SWAP_FAIL] and the hot vmstats_percpu
pointer onto the same cacheline.
The stress-ng mremap stressor exercises MADV_PAGEOUT with swap disabled,
generating about 20 million MEMCG_SWAP_FAIL updates per 60-second run on a
176-CPU test system. Those writes bounce the line while memcg statistics
paths load vmstats_percpu.
Move cgwb_list into the existing alignment gap and cacheline-align
vmstats_percpu. This separates the pointer from the event counters
without increasing the size of struct mem_cgroup in the tested
configuration.
The blamed commit reduced median mremap throughput by 4.38% on the test
system with one socket. The patched kernel brings the performance to
within 0.5% of the parent which is within the observed boot-to-boot spread
(up to 1.2%).
Link: https://lore.kernel.org/20260817103835.2937733-1-usama.arif@linux.dev
Fixes: ea928e9e18da ("mm/vmpressure: move v1 userspace eventfd code into memcontrol-v1.c")
Signed-off-by: Usama Arif <usama.arif@linux.dev>
Reported-by: kernel test robot <yi1.lai@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202608131743.c6a7dda4-lkp@intel.com
Tested-by: kernel test robot <yi1.lai@intel.com>
Link: http://lore.kernel.org/aoAABX59IzUXz/Rv@ly-workstation
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Yi Lai <yi1.lai@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
alpha requires percpu variables in modules to be defined as weak so that the
compiler generates GOT based external references for them. This puts two
extra restrictions on percpu variable definitions. The symbol must be
globally unique even when static and a static percpu variable can't be
defined inside a function. DEBUG_FORCE_WEAK_PER_CPU exists to give generic
code build coverage for these restrictions without building for alpha.
MEM_ALLOC_PROFILING defines a static percpu counter at each allocation call
site and thus can't be built with weak percpu definitions, so it depends on
!DEBUG_FORCE_WEAK_PER_CPU. As allmodconfig enables DEBUG_FORCE_WEAK_PER_CPU,
this knocks MEM_ALLOC_PROFILING out of allmodconfig build coverage.
allmodconfig coverage for MEM_ALLOC_PROFILING is worth more than build
coverage for restrictions which only matter to alpha module builds. Drop
DEBUG_FORCE_WEAK_PER_CPU. Restriction violations will now show up only on
alpha builds.
Link: https://lore.kernel.org/178656406317.2437052.7257990869957704195@slm.duckdns.org
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Gabriele Monaco <gmonaco@redhat.com> [include/rv/da_monitor.h]
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
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Currently swap to and from file systems goes through two indirect calls
between the swap ops and the swap_rw method. Reduce this by directly
providing the swap_ops from the file system.
For this refactor swap_fs_submit into a swap_fs_prepare_rw helper that
initializes the iov_iter on the callers stack so that file systems can
call it directly, and use that to initialize file system specific ops in
the NFS and SMB clients, which then get passed to swap_fs_activate.
Link: https://lore.kernel.org/20260723054622.3460249-4-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Chris Li <chrisl@kernel.org>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kairui Song <ryncsn@gmail.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Steve French <sfrench@samba.org>
Cc: Usama Arif <usama.arif@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Add a new header to declare the swap_iocb, swap_ops and swap_ctx to allow
for swap_ops implementations outside of mm/page_io.c. This will be used
to remove the double indirection for file system-based swap. There is no
functional change, just a move of the declarations.
Note that there already is a swapops.h header, which is totally unrelated
to struct swap_ops. The close naming is a bit unfortunate, but I could
not think of a better name for this header.
Link: https://lore.kernel.org/20260723054622.3460249-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Chris Li <chrisl@kernel.org>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kairui Song <ryncsn@gmail.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Steve French <sfrench@samba.org>
Cc: Usama Arif <usama.arif@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Count how many swap I/Os we cause. Due to batching this can be different
than the current counter number of pages written/read, and tracking this
information is useful to see how efficient the batching is.
The counters are added at the end of enum vm_event_item and the
vmstat_text array under the assumption that the order of fields in
/proc/vmstat is an ABI. If that is not the case, they could be grouped
with the other swap counters.
Link: https://lore.kernel.org/20260713093350.2154226-8-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Youngjun Park <youngjun.park@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Provide a swap_fs_activate helper that directly sets up swap_fs_ops, and a
flag in struct swap_ops to indicate of NOFS swapping is allowed.
Link: https://lore.kernel.org/20260713093350.2154226-7-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Youngjun Park <youngjun.park@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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This simplifies codes and makes logic clearer. And also makes later any
new swap device type being added easier to handle.
Currently there are two types of swap devices: fs and bdev.
[hch@lst.de: updated for the new submit and can_merge abstraction]
Link: https://lore.kernel.org/20260713093350.2154226-6-hch@lst.de
Signed-off-by: Baoquan He <baoquan.he@linux.dev>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Suggested-by: Chris Li <chrisl@kernel.org>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Youngjun Park <youngjun.park@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "better block swap batching and a different take on swap_ops
v5".
This series makes use of the swap_iocb for block as well so that it
doesn't do inefficient single-bio I/O, and then rebases the swap_ops from
Baoquan on top of the now very different method structure.
When running doing kernels builds, which is a workload that doesn't really
do much THP anonymous memory it still gets 2x clustering for writeout and
1.2x for reading back swap in. The overall times do not actually change,
though.
This patch (of 7):
Provide a wrapper for the shmem abuses in drm to prepare for swap I/O
refactoring by keeping swap_iocb handling entirely contained in mm/.
Link: https://lore.kernel.org/20260713093350.2154226-1-hch@lst.de
Link: https://lore.kernel.org/20260713093350.2154226-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Baoquan He <baoquan.he@linux.dev>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: Chris Li <chrisl@kernel.org>
Reviewed-by: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Youngjun Park <youngjun.park@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Extend the allocinfo filtering mechanism to allow users to filter tags
based on their accuracy.
[abhishekbapat@google.com: move `inaccurate` filtering criteria from `struct allocinfo_tag` to `struct allocinfo_filter`]
Link: https://lore.kernel.org/e4e49ec4a5960292aeeb9e196526c18dc95228a2.1785867739.git.abhishekbapat@google.com
Link: https://lore.kernel.org/396a5e4bc3b2990223ab355f2cd3ceb6aa15499e.1783532853.git.abhishekbapat@google.com
Signed-off-by: Abhishek Bapat <abhishekbapat@google.com>
Acked-by: Hao Ge <hao.ge@linux.dev>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Sourav Panda <souravpanda@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Extend the allocinfo filtering mechanism to allow users to filter tags
based on the total number of bytes allocated [min_size, max_size]. The
size range is inclusive.
Filtering by size involves retrieving allocinfo per-CPU counters, which is
an expensive operation. Hence, the performance of size-based filtering
will be worse than other filters.
Link: https://lore.kernel.org/0a7653b70ae0d64e967fbea0e933bc35f8ac656e.1783532853.git.abhishekbapat@google.com
Signed-off-by: Abhishek Bapat <abhishekbapat@google.com>
Acked-by: Hao Ge <hao.ge@linux.dev>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Sourav Panda <souravpanda@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Extend the capability of the IOCTL mechanism to filter allocations based
on tag's module name, function name, file name and line number.
Link: https://lore.kernel.org/6a6100c0c58cb2911f39126b9fe177a8c17db16f.1783532853.git.abhishekbapat@google.com
Signed-off-by: Abhishek Bapat <abhishekbapat@google.com>
Acked-by: Hao Ge <hao.ge@linux.dev>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Sourav Panda <souravpanda@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "alloc_tag: introduce IOCTL-based filtering for MAP", v8.
Currently, memory allocation profiling data is primarily exposed through
/proc/allocinfo. While useful for manual inspection, this text-based
interface poses challenges for production monitoring and large-scale
analysis:
1. Userspace must parse large amounts of text to extract specific
fields.
2. To find specific tags, userspace must read the entire dataset,
requiring many context switches and high data copying.
3. The kernel currently aggregates per-CPU counters for every allocation
size, even those the user intends to filter out immediately.
This series introduces a new IOCTL-based binary interface for allocinfo
that supports kernel-side filtering. By allowing the user to specify a
filter mask, we significantly reduce the work performed in-kernel and the
amount of data transferred to userspace. The IOCTL mechanism was chosen
for allocinfo to address the per-CPU counter aggregation bottleneck. A
traditional read() operation must report the total allocation count and
sizes for every code tag in the system. Doing so requires iterating
across all CPUs to sum their per-CPU counters for thousands of tags, which
introduces substantial runtime overhead.
The IOCTL interface allows userspace to push selective filtering criteria
directly into the kernel before the per-CPU counter aggregation. The
kernel aggregates per-CPU counters only for a small subset of tags that
match the filter. This results in significant performance improvement.
Beyond fast filtered retrieval, the IOCTL foundation allows introducing a
context capture mechanism in the future to capture the context for
specific allocations.
Performance measurements were conducted on an Intel Xeon Platinum 8481C
(224 CPUs) with caches dropped before each run.
The IOCTL mechanism shows a ~20x performance improvement for
filtered queries. The kernel avoids the expensive per-CPU counter
aggregation (alloc_tag_read) for any tags that fail the initial string
or location filters.
Scenario 1: Specific File Filtering (arch/x86/events/rapl.c)
1. Traditional (cat /proc/allocinfo | grep): 22ms (sys)
2. IOCTL Interface: 1ms (sys)
Scenario 2: Compound Filtering (Filename + Size)
1. Traditional: (cat ... | grep | awk): 21ms (sys)
2. IOCTL Interface: 1ms (sys)
Scenario 3: Size-Based Filtering (min_size = 1MB)
1. Traditional: (cat ... | awk): 21ms (sys)
2. IOCTL Interface: 14ms (sys)
This patch (of 6):
Add the following ioctl commands for /proc/allocinfo file:
ALLOCINFO_IOC_CONTENT_ID - gets content identifier which can be used to
check whether the file content has changed specifically due to module
load/unload. Every time a module is loaded / unloaded, the returned value
will be different. By comparing the identifier value at the beginning and
at the end of the content retrieval operation, users can validate
retrieved information for consistency.
ALLOCINFO_IOC_GET_AT - gets the record at the specified position. This is
the position of a record in /proc/allocinfo.
ALLOCINFO_IOC_GET_NEXT - gets the record next to the last retrieved one.
If no records were previously retrieved, returns the first record.
Note, function file and module names often have the same prefixes,
therefore when filtering for them, we compare the last 64 characters to
minimize the chances of name collisions.
[akpm@linux-foundation.org: include compat.h, per Suren]
Closes: https://lore.kernel.org/oe-kbuild-all/202607091820.qbjlGhKK-lkp@intel.com/
Link: https://lore.kernel.org/cover.1783532853.git.abhishekbapat@google.com
Link: https://lore.kernel.org/15596de2607ef13e7c77c6d74763f4ae992ec475.1783532853.git.abhishekbapat@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Abhishek Bapat <abhishekbapat@google.com>
Acked-by: Hao Ge <hao.ge@linux.dev>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Sourav Panda <souravpanda@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Fix the following sparse warnings that appear while building f2fs:
./include/trace/events/f2fs.h:1469:1: warning: incorrect type in initializer (different base types)
./include/trace/events/f2fs.h:1469:1: expected unsigned long mask
./include/trace/events/f2fs.h:1469:1: got restricted vm_fault_t
Link: https://lore.kernel.org/e56c9e2aead04f79192c3110de80d846e41e3791.1786122711.git.bvanassche@acm.org
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.kahndual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The kernel-doc for struct execmem_range incorrectly describes @fallback_end
as "start". Correct it to "end".
Link: https://lore.kernel.org/20260807091958.4735-1-henry.elderman.edu+linux@gmail.com
Signed-off-by: Henry Elderman <henry.elderman.edu+linux@gmail.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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mem_section_usage_size() is only needed by sparsemem implementation code
after commit ae751d567baa ("mm/bootmem_info: stop marking
mem_section_usage as MIX_SECTION_INFO"), so keeping the declaration in
mmzone.h now exposes the helper to all mmzone.h users for no reason.
Move the helper to sparse.h so sparse.c and sparse-vmemmap.c can share it
through the internal header. While doing so, calculate the allocation
size with struct_size_t(), which ties the expression to the
pageblock_flags trailing array instead of open-coding the struct header
plus bitmap size.
Link: https://lore.kernel.org/20260805022536.1206575-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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pgdat_page_ext_init() sets pgdat->node_page_ext to NULL only on FLATMEM.
FLATMEM depends on !NUMA, so the pgdat is always the zero-initialized
contig_page_data and the store has no effect.
So remove the call site, the unused function and its declaration.
No functional change.
Link: https://lore.kernel.org/20260804151145.3419768-3-ekffu200098@gmail.com
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
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vm_struct::nr_pages is an unsigned int, and the file keeps deriving byte
counts from it as nr_pages << PAGE_SHIFT. A shift is evaluated in the
type of its promoted left operand, so those are 32-bit arithmetic and wrap
at 4 GiB of bytes, which is 2^20 pages. Every site depends on a cast
being remembered; vmap() has one, two recent commits did not.
vread_iter() then computes a size of zero for a 4 GiB VM_ALLOC area and
/proc/kcore returns it as zeros while reporting a successful read, which
drgn, crash or gdb cannot tell from real memory, and the vrealloc()
grow-in-place check declines a request that would have fit.
Widen the field so the class of bug goes away instead of one site at a
time. Everything feeding or consuming it widens too:
vm_area_alloc_pages() and its accumulators, nr_small_pages, new_nr_pages
and old_nr_pages, the index range of vm_area_free_pages(), and three page
indexes that were plain int. Five casts go. Two prints needed fixing as
well, %u in vmalloc_dump_obj() and %d for the unsigned field in
vmalloc_info_show().
No bug report behind this, I found it reading the code. The 4 GiB wrap
needs only a machine with over 4 GiB of memory. Neither larger threshold
is a practical concern: 2^32 pages, where the field itself truncates, is
16 TiB and beyond what hardware can populate, and 2^31, where the plain
int indexes break, is 8 TiB and larger than anything in the tree asks for.
The int *nr cursor in the mapping path is unchanged and is separate work.
Users outside mm/vmalloc.c need no change either. Those handing the
count to a narrower parameter cannot drive it near 2^31, and
kho_preserve_vmalloc() stores it into a 32-bit ABI field that still
receives the same low bits; above 2^32 pages the truncation just moves out
of vm_struct into that store.
sizeof(struct vm_struct) on x86-64 stays 72 bytes with
CONFIG_HAVE_ARCH_HUGE_VMALLOC=n and goes from 72 to 80 with it enabled,
both inside the kmalloc-96 bucket it already comes from.
Link: https://lore.kernel.org/20260801114915.115224-1-iprintercanon@gmail.com
Fixes: 0bca23804632 ("mm/vmalloc: use physical page count in vread_iter() for VM_ALLOC areas")
Fixes: d57ac904ffdc ("mm/vmalloc: use physical page count for vrealloc() grow-in-place check")
Signed-off-by: Artem Lytkin <iprintercanon@gmail.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Assisted-by: Claude:claude-fable-5
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: <shivamkalra98@zohomail.in>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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KVM with guest_memfd wants to remove any folio references due to LRU
caches, as it really must only allow to convert folios from shared to
private when there are no unexpected folio references (e.g., from GUP
references).
So, to drive the refcount down, it needs a way to flush the LRU caches.
Let's factor out what we have in lru_cache_drain_for_folio(). Document
it, and also mention that concurrent folio (un)mapping might, in theory,
miss detecting LRU cache references. Keep obtaining the expected refcount
twice to minimize the possibility. For the current and future user that
should work, and we don't really have a better alternative: we could
detect if the mapcount changed, but it would still be racy and add more
complexity with questionable benefit.
Maybe there is a chance to avoid the draining entirely in the future, by
avoiding extra references from the LRU cache: Hugh thinks there might be a
way. But for the time being, this handling is unfortunately required.
Make folio_may_be_lru_cached() accept a const pointer so
lru_cache_drain_for_folio() can accept a const pointer as well.
Link: https://lore.kernel.org/20260806-lru_cache_drain_for_folio-v1-1-c6287d295e99@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Cc: Ackerley Tng <ackerleytng@google.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
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The anon/file scan balance in get_scan_count() is driven by two scalars in
struct lruvec, anon_cost and file_cost, accumulated by every reclaim
producer under lruvec->lru_lock. The acquisition sites for cost work
specifically are:
- shrink_inactive_list() re-takes lru_lock at function exit purely
to call lru_note_cost_unlock_irq() with (nr_pageout, nr_scanned -
nr_reclaimed). One acquisition per inactive shrink.
- shrink_active_list() does the same with (0, nr_rotated). One
acquisition per active shrink.
- workingset_refault() takes the lock via folio_lruvec_lock_irq()
purely to record the refault cost. One acquisition per refault.
- prepare_scan_control() takes lru_lock just to snapshot the two
scalars into sc->{anon,file}_cost.
- lru_note_cost_unlock_irq() itself walks parent_lruvec and
re-acquires lru_lock on each ancestor to propagate the update,
adding O(memcg-depth) acquisitions per producer call.
This hurts because lru_lock is already a heavy contention point on
memory-heavy workloads: every isolate_lru_folios(), move_folios_to_lru()
and folio_add_lru() takes it. The cost work itself is trivial (two scalar
bumps and one comparison), but it contends with and causes contention for
actual LRU manipulation. The parent_lruvec() walk also multiplies
cost-update overhead by memcg hierarchy depth.
The balance formula for anon and file, respectively, is this:
cost = nr_io * SWAP_CLUSTER_MAX + nr_rotated
Instead of recording cost and running averaging logic directly when these
events occur, snapshot running vmstat counters once per reclaim cycle and
derive the balance from event deltas since the last run.
Use PGROTATE_* from the preceding patch for the rotation input.
WORKINGSET_RESTORE_* and NR_VMSCAN_WRITE provide the remaining event
counters. Charge NR_VMSCAN_WRITE through lruvec stats so all inputs can
be sampled per lruvec and aggregated through the memcg hierarchy. This is
overall cheaper and has fewer lock acquisition sites.
Moving accumulation and decay to the reclaim side also improves the cost
model across reclaim gaps. With producer-side decay, events that happen
while reclaim is idle still age each other before reclaim ever samples the
costs. If a workload refaults a large anon set and then a smaller file
set before reclaim runs again, the later file activity can age the earlier
anon activity out of the cost model. The new scheme observes the whole
between-reclaim delta and decays anon and file proportionally, so the
scan-balance history better represents what happened since the last
reclaim pass.
A dedicated per-lruvec spinlock, cost_lock, serialises the delta
extraction, the cost->count update and the halving loop against concurrent
reclaimers in the same memcg+node.
NR_VMSCAN_WRITE is accounted at writeout(), so reclaim_stat.nr_pageout is
no longer needed and is removed.
memcg-v1's memory.stat anon_cost/file_cost is now sourced from
cost[].count instead of the removed lruvec anon_cost/file_cost fields.
The reported values only refresh when prepare_scan_control() runs and are
bounded at ~lrusize/4 by the halving loop; the scan-balance signal they
express is unchanged.
Under pure MGLRU the scan-balance signal itself is not consumed (both
prepare_scan_control() and get_scan_count() are short-circuited on the
MGLRU paths, and MGLRU's own type/tier selection comes from
read_ctrl_pos() on lrugen->{avg_refaulted,avg_total,refaulted,evicted},
not from anon_cost/file_cost). NR_VMSCAN_WRITE naturally covers writeout
from either reclaim implementation. The preceding patch also bumps
PGROTATE_{ANON,FILE} from evict_folios(), so rotation-driven reclaim work
is accounted consistently across both implementations.
Link: https://lore.kernel.org/20260727162550.2032-4-usama.arif@linux.dev
Signed-off-by: Usama Arif <usama.arif@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
