kernel/git/stable/linux.git/lib/raid, branch master

raid6/kunit: add a benchmark

2026-08-04T04:10:16+00:00

Add a benchmark to test the RAID 6 P/Q functions for more representative block sizes and numbers of disks. This splits the maximum alloc size used for the benchmark from the max size for the kunit test because recovery is currently limited to a single page at a time. Hopefully this will be fixed soon. The runtime numbers are reported in GB/s as the numbers of modern implementations are basically unreadable as MB/s. This means retro-architectures could report 0, but that is an easy tradeoff. Link: https://lore.kernel.org/20260715144825.95432-9-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

raid6: improve the runtime selection benchmark

2026-08-04T04:10:16+00:00

Use plain ktime_get_ns for the timing, use 8 + 2 disks for a realistic load, and report the throughput on the data disks as that is what storage systems are measured on. Link: https://lore.kernel.org/20260715144825.95432-8-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

raid6: defer implementation selection when built-in

2026-08-04T04:10:16+00:00

Don't hold up early boot and defer the selection just like we've been doing for the RAID5 XOR code since commit 524ccdbdfb52 ("crypto: xor - defer load time benchmark to a later time"). This will also allow full use of the timing subsystem for benchmarking. Link: https://lore.kernel.org/20260715144825.95432-7-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

raid6: enable lock context analysis

2026-08-04T04:10:16+00:00

The code doesn't have any locking, so this is trivial. Link: https://lore.kernel.org/20260715144825.95432-6-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

xor/kunit: add a benchmark

2026-08-04T04:10:15+00:00

Add a benchmark to test the XOR functions for more representative block sizes and numbers of disks. Including 64k would be useful here, but increasing the test buffer size increases the runtime of the functional kunit test too much unfortunately. The runtime numbers are reported in GB/s as the numbers of modern implementations are basically unreadable as MB/s. This means retro-architectures could report 0, but that is an easy tradeoff. Link: https://lore.kernel.org/20260715144825.95432-5-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

xor/kunit: fix a spelling error

2026-08-04T04:10:15+00:00

Link: https://lore.kernel.org/20260715144825.95432-4-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

xor: improve the runtime selection benchmark

2026-08-04T04:10:15+00:00

Use plain ktime_get_ns for the timing, use 4 + 1 disks for a realistic load, and report the throughput on the data disks instead of the that on the parity disk, which isn't all that useful. Link: https://lore.kernel.org/20260715144825.95432-3-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

xor: enable lock context analysis

2026-08-04T04:10:15+00:00

Patch series "misc lib/raid/ improvements v2". This series improves the benchmark-based algorithm selection and adds kunit benchmarks for both the XOR and raid6 libraries, and tidies up a few very minor other bits. This patch (of 8): The code doesn't have any locking, so this is trivial. Link: https://lore.kernel.org/20260715144825.95432-1-hch@lst.de Link: https://lore.kernel.org/20260715144825.95432-2-hch@lst.de Signed-off-by: Christoph Hellwig Cc: Eric Biggers Signed-off-by: Andrew Morton

raid6: fix raid6_recov_rvv symbol undeclared warning

2026-06-25T17:51:32+00:00

The riscv recov_rvv.c should have included pq_arch.h for the definition of raid6_recov_rvv. Add the include to fix the following sparse warning: lib/raid/raid6/riscv/recov_rvv.c:218:32: warning: symbol 'raid6_recov_rvv' was not declared. Should it be static? Signed-off-by: Ben Dooks Reviewed-by: Nam Cao Link: https://patch.msgid.link/20260622135535.481534-1-ben.dooks@codethink.co.uk Signed-off-by: Paul Walmsley

raid6: fix riscv symbol undeclared warnigns

2026-06-25T17:47:39+00:00

The riscv rvv.c file is missing the include of pq_arch.h which defines all the exported functions. Include this to remove the following sparse warnings: lib/raid/raid6/riscv/rvv.c:1225:1: warning: symbol 'raid6_rvvx1' was not declared. Should it be static? lib/raid/raid6/riscv/rvv.c:1226:1: warning: symbol 'raid6_rvvx2' was not declared. Should it be static? lib/raid/raid6/riscv/rvv.c:1227:1: warning: symbol 'raid6_rvvx4' was not declared. Should it be static? lib/raid/raid6/riscv/rvv.c:1228:1: warning: symbol 'raid6_rvvx8' was not declared. Should it be static? Signed-off-by: Ben Dooks Reviewed-by: Nam Cao Link: https://patch.msgid.link/20260622135207.480540-1-ben.dooks@codethink.co.uk Signed-off-by: Paul Walmsley