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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-25 07:59:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-25 07:59:44 -0700 |
| commit | 9cebfe6504488198b012e746bc6b313f88b95439 (patch) | |
| tree | 8fc504cea938827aba411494141c266f448c39bd /Documentation/block | |
| parent | ce14fe4cd756d2ad75a1f5b53816872b4e69f7cc (diff) | |
| parent | 34b5c4a6e4fb9dbb3f9d87f3b0fb0372105c8302 (diff) | |
| download | linux-9cebfe6504488198b012e746bc6b313f88b95439.tar.gz linux-9cebfe6504488198b012e746bc6b313f88b95439.zip | |
Merge tag 'fuse-update-7.3' of 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
...
Diffstat (limited to 'Documentation/block')
| -rw-r--r-- | Documentation/block/ublk.rst | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/Documentation/block/ublk.rst b/Documentation/block/ublk.rst index 0413dcd9ef69..28300fee22bf 100644 --- a/Documentation/block/ublk.rst +++ b/Documentation/block/ublk.rst @@ -382,17 +382,17 @@ Zero copy --------- ublk zero copy relies on io_uring's fixed kernel buffer, which provides -two APIs: `io_buffer_register_bvec()` and `io_buffer_unregister_bvec`. +two APIs: `io_buffer_register_request()` and `io_buffer_unregister`. ublk adds IO command of `UBLK_IO_REGISTER_IO_BUF` to call -`io_buffer_register_bvec()` for ublk server to register client request +`io_buffer_register_request()` for ublk server to register client request buffer into io_uring buffer table, then ublk server can submit io_uring IOs with the registered buffer index. IO command of `UBLK_IO_UNREGISTER_IO_BUF` -calls `io_buffer_unregister_bvec()` to unregister the buffer, which is -guaranteed to be live between calling `io_buffer_register_bvec()` and -`io_buffer_unregister_bvec()`. Any io_uring operation which supports this -kind of kernel buffer will grab one reference of the buffer until the -operation is completed. +calls `io_buffer_unregister()` to unregister the buffer, which is guaranteed +to be live between calling `io_buffer_register_request()` and +`io_buffer_unregister()`. Any io_uring operation which supports this kind of +kernel buffer will grab one reference of the buffer until the operation is +completed. ublk server implementing zero copy or user copy has to be CAP_SYS_ADMIN and be trusted, because it is ublk server's responsibility to make sure IO buffer |
