linux-toradex.git/lib/raid/xor, branch master Linux kernel for Apalis and Colibri modules Merge tag 'mm-nonmm-stable-2026-10-25-14-57' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 2026-10-27T22:08:22+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-10-27T22:08:22+00:00 7d1f84f1b94e79cb95d974ab3ec54cb3a4d64f5b Pull non-MM updates from Andrew Morton: - "ocfs2: exit recovery thread on mount error path" (Joseph Qi): Stop OCFS2 recovery before freeing failed-mount state and replay slots, closing use-after-free and double-free races. Defer suballocator reclaim to break a transaction-lock deadlock with dismount. - "ocfs2: validate suballoc slot and bit of metadata blocks" (Joseph Qi): Validate OCFS2 metadata suballocator slots, bits and directory index block locations. Reject corrupt metadata with filesystem errors instead of BUGs or out-of-bounds accesses. - "ocfs2: deal with legacy signed name hash values" (Joseph Qi): Restore OCFS2 lookups for non-ASCII names stored with legacy signed hashes. Use stored xattr hashes during bucket splits to avoid duplicate entries and spurious ENOSPC failures. - "ocfs2: stabilize dentry names in file and setattr traces" (Cen Zhang): Snapshot OCFS2 names during file and setattr tracing to prevent rename races using freed storage or mismatched names and lengths. Preserve trace formats and the locked release open-count sample. - "panic: fix panic_force_cpu= redirect races and NMI bypass" (Bradley Morgan): Fix panic_force_cpu races and NMI redirection so crash-kernel CPU selection is honored. Preserve variable arguments on failed redirects and use a static message buffer. - "fat: allocate multiple clusters in fallocate" (Matheus Alves de Almeida): Allocate FAT clusters in batches for FALLOC_FL_KEEP_SIZE and batch FAT updates. This removes repeated single-cluster allocation overhead, particularly on synchronous mounts. - "scripts/gdb: fix radix tree lookup and stack depot diagnostic" (Ting-Han Hou): Fix GDB radix-tree lookup and its handling of XArray sibling, retry and zero entries. Also repair the stack-depot diagnostic for an out-of-range pool index. - "hung_task: Improve warning budget handling and task reporting" (Aaron Tomlin): Reset the hung-task warning budget after recovery so later hangs remain visible. Keep the configured limit intact and emit one summary per scan when detailed reports exhaust the budget. - "bootconfig: Reject unexpected data after null character and cleanups" (Masami Hiramatsu): Reject bootconfig data after an embedded null while accepting trailing padding. Validate the full input in the userspace tool, and retain internal tree sanity checks there rather than in the kernel. - "kbuild: GCOV cleanups following the prefer-atomic fix" (Konstantin Khorenko): Use the actual GCOV build flags in the prefer-atomic compiler probe. Move flag setup into scripts/Makefile.gcov and skip the probe when GCOV is disabled. - "ocfs2: xattr bucket validation fixes" (Joseph Qi): Accept valid OCFS2 xattr buckets spanning 512-byte blocks, avoiding false read-only remounts. Reject misaligned buckets and return errors instead of panicking on corrupt defrag metadata. - "ocfs2: fix metadata reservation for xattr value trees" (Joseph Qi): Reserve enough OCFS2 metadata for new and relocated xattr value trees. Fix shortfalls which could cause ENOSPC, dropped entries and leaked clusters on fragmented filesystems; remove duplicate reservations. - "Introduce arch_do_panic" (Mete Durlu): Add arch_do_panic() and move s390 and sparc handling out of generic panic code. The architecture-specific actions now follow the end-of-panic marker. - "checkpatch: userspace improvements" (Petr Vorel): Improve checkpatch's userspace detection and suppress kernel-only checks. Recognize standard inttypes macros and add explicit --userspace and --no-userspace overrides. - "ocfs2: validate dr_fs_generation of dir index root blocks" (Joseph Qi): Check OCFS2 directory index generations and leaf block numbers. Reject stale or misplaced blocks instead of using metadata left by a previously formatted filesystem. - "selftests/membarrier: Skip an unregistered memory barrier test on Musl" (Chris Gellermann): Skip the unregistered membarrier test when libc has already registered the command. Musl does this during thread creation, causing false failures in the multithreaded test. - "init: fix array boundary bugs in boot parameter parsing" (Wilson Felipe Pereira): Fix boot argument boundary cases which leave stale arguments in init's command line or panic when replacing the final environment variable. Clear the last slot and check duplicates before the limit. Summary of the 87 singletons in this merge: The OCFS2 singletons fix deadlocks between xattr updates and inline truncation, and during inode reclaim. Corrupt quota and extent metadata could also crash the kernel or corrupt memory; these paths now check the layout before using it. Other fixes close use-after-free and publication races around cluster reconfiguration, node failure, quota remount errors and shared refcount trees. New files now retain security labels from all stacked LSMs instead of silently dropping all but one. Valid xattr insertions also stop tripping FORTIFY on builds with counted arrays. Elsewhere, a lost wakeup could leave hardware-monitoring reads stuck in unkillable sleep and block further I2C traffic. That is fixed, as are kernel memory leaks in POSIX message-queue notifications and tmpfs casefold setup which could grow until memory is exhausted. A driver removal race which could crash the kernel is fixed too. The hibernation command through reboot() also stops taking the same mutex twice, avoiding a deadlock before suspension. On the boot side, bzip2 decoding now accepts valid full blocks emitted by lbzip2, fixing failures to boot those compressed kernels. Malformed bzip2 streams can no longer overflow the decode buffer, and LZ4 initrds are checked before the decoder can read past their end. FAT rejects geometry which overflows the data-area calculation on 32-bit systems, and rolls back entries when inode setup fails, preventing failed creations from reappearing after remount. The x86 XOR and RAID6 AVX paths also avoid imposing a slowdown on subsequent SSE code. * tag 'mm-nonmm-stable-2026-10-25-14-57' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (134 commits) scripts/gdb: fix stack depot out-of-bounds diagnostic scripts/gdb: fix radix tree lookup pointer handling ocfs2/cluster: remove zero-address nodes from IP tree on teardown ocfs2: snapshot the dentry name while tracing file release ocfs2: snapshot dentry names in file and setattr traces ocfs2/dlm: drain join handlers before releasing module text MAINTAINERS: update Markus's e-mail address mailmap: add entries for Andrew Jones stackdepot: stop preallocating after the final pool ocfs2: drain quorum work before removing the cluster watchdog: force console verbose when reporting lockups profiling: fix sampling step on 64-bit big-endian systems kernel/reboot: avoid potential deadlocks during suspension compat: avoid double rounding in times() ocfs2: pin owning modules for open debugfs files ocfs2/cluster: initialize heartbeat regions before publishing them selftests/proc: proc-pid-vm: fix unused variable warning on non-x86 ocfs2: pin refcount trees before dropping the lookup lock ocfs2: validate the xattr tree root of an indexed xattr block ocfs2/dlm: hold the lookup reference across convert AST enqueue ... 
Pull non-MM updates from Andrew Morton:

 - "ocfs2: exit recovery thread on mount error path" (Joseph Qi):

   Stop OCFS2 recovery before freeing failed-mount state and replay
   slots, closing use-after-free and double-free races. Defer
   suballocator reclaim to break a transaction-lock deadlock with
   dismount.

 - "ocfs2: validate suballoc slot and bit of metadata blocks" (Joseph
   Qi):

   Validate OCFS2 metadata suballocator slots, bits and directory index
   block locations. Reject corrupt metadata with filesystem errors
   instead of BUGs or out-of-bounds accesses.

 - "ocfs2: deal with legacy signed name hash values" (Joseph Qi):

   Restore OCFS2 lookups for non-ASCII names stored with legacy signed
   hashes. Use stored xattr hashes during bucket splits to avoid
   duplicate entries and spurious ENOSPC failures.

 - "ocfs2: stabilize dentry names in file and setattr traces" (Cen
   Zhang):

   Snapshot OCFS2 names during file and setattr tracing to prevent
   rename races using freed storage or mismatched names and lengths.
   Preserve trace formats and the locked release open-count sample.

 - "panic: fix panic_force_cpu= redirect races and NMI bypass" (Bradley
   Morgan):

   Fix panic_force_cpu races and NMI redirection so crash-kernel CPU
   selection is honored. Preserve variable arguments on failed redirects
   and use a static message buffer.

 - "fat: allocate multiple clusters in fallocate" (Matheus Alves de
   Almeida):

   Allocate FAT clusters in batches for FALLOC_FL_KEEP_SIZE and batch
   FAT updates. This removes repeated single-cluster allocation
   overhead, particularly on synchronous mounts.

 - "scripts/gdb: fix radix tree lookup and stack depot diagnostic"
   (Ting-Han Hou):

   Fix GDB radix-tree lookup and its handling of XArray sibling, retry
   and zero entries. Also repair the stack-depot diagnostic for an
   out-of-range pool index.

 - "hung_task: Improve warning budget handling and task reporting"
   (Aaron Tomlin):

   Reset the hung-task warning budget after recovery so later hangs
   remain visible. Keep the configured limit intact and emit one summary
   per scan when detailed reports exhaust the budget.

 - "bootconfig: Reject unexpected data after null character and
   cleanups" (Masami Hiramatsu):

   Reject bootconfig data after an embedded null while accepting
   trailing padding. Validate the full input in the userspace tool, and
   retain internal tree sanity checks there rather than in the kernel.

 - "kbuild: GCOV cleanups following the prefer-atomic fix" (Konstantin
   Khorenko):

   Use the actual GCOV build flags in the prefer-atomic compiler probe.
   Move flag setup into scripts/Makefile.gcov and skip the probe when
   GCOV is disabled.

 - "ocfs2: xattr bucket validation fixes" (Joseph Qi):

   Accept valid OCFS2 xattr buckets spanning 512-byte blocks, avoiding
   false read-only remounts. Reject misaligned buckets and return errors
   instead of panicking on corrupt defrag metadata.

 - "ocfs2: fix metadata reservation for xattr value trees" (Joseph Qi):

   Reserve enough OCFS2 metadata for new and relocated xattr value
   trees. Fix shortfalls which could cause ENOSPC, dropped entries and
   leaked clusters on fragmented filesystems; remove duplicate
   reservations.

 - "Introduce arch_do_panic" (Mete Durlu):

   Add arch_do_panic() and move s390 and sparc handling out of generic
   panic code. The architecture-specific actions now follow the
   end-of-panic marker.

 - "checkpatch: userspace improvements" (Petr Vorel):

   Improve checkpatch's userspace detection and suppress kernel-only
   checks. Recognize standard inttypes macros and add explicit
   --userspace and --no-userspace overrides.

 - "ocfs2: validate dr_fs_generation of dir index root blocks" (Joseph
   Qi):

   Check OCFS2 directory index generations and leaf block numbers.
   Reject stale or misplaced blocks instead of using metadata left by a
   previously formatted filesystem.

 - "selftests/membarrier: Skip an unregistered memory barrier test on
   Musl" (Chris Gellermann):

   Skip the unregistered membarrier test when libc has already
   registered the command. Musl does this during thread creation,
   causing false failures in the multithreaded test.

 - "init: fix array boundary bugs in boot parameter parsing"
   (Wilson Felipe Pereira):

   Fix boot argument boundary cases which leave stale arguments in
   init's command line or panic when replacing the final environment
   variable. Clear the last slot and check duplicates before the limit.

Summary of the 87 singletons in this merge:

  The OCFS2 singletons fix deadlocks between xattr updates and inline
  truncation, and during inode reclaim. Corrupt quota and extent
  metadata could also crash the kernel or corrupt memory; these paths
  now check the layout before using it. Other fixes close use-after-free
  and publication races around cluster reconfiguration, node failure,
  quota remount errors and shared refcount trees. New files now retain
  security labels from all stacked LSMs instead of silently dropping all
  but one. Valid xattr insertions also stop tripping FORTIFY on builds
  with counted arrays.

  Elsewhere, a lost wakeup could leave hardware-monitoring reads stuck
  in unkillable sleep and block further I2C traffic. That is fixed, as
  are kernel memory leaks in POSIX message-queue notifications and tmpfs
  casefold setup which could grow until memory is exhausted. A driver
  removal race which could crash the kernel is fixed too. The
  hibernation command through reboot() also stops taking the same mutex
  twice, avoiding a deadlock before suspension.

  On the boot side, bzip2 decoding now accepts valid full blocks emitted
  by lbzip2, fixing failures to boot those compressed kernels. Malformed
  bzip2 streams can no longer overflow the decode buffer, and LZ4
  initrds are checked before the decoder can read past their end. FAT
  rejects geometry which overflows the data-area calculation on 32-bit
  systems, and rolls back entries when inode setup fails, preventing
  failed creations from reappearing after remount. The x86 XOR and RAID6
  AVX paths also avoid imposing a slowdown on subsequent SSE code.

* tag 'mm-nonmm-stable-2026-10-25-14-57' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (134 commits)
  scripts/gdb: fix stack depot out-of-bounds diagnostic
  scripts/gdb: fix radix tree lookup pointer handling
  ocfs2/cluster: remove zero-address nodes from IP tree on teardown
  ocfs2: snapshot the dentry name while tracing file release
  ocfs2: snapshot dentry names in file and setattr traces
  ocfs2/dlm: drain join handlers before releasing module text
  MAINTAINERS: update Markus's e-mail address
  mailmap: add entries for Andrew Jones
  stackdepot: stop preallocating after the final pool
  ocfs2: drain quorum work before removing the cluster
  watchdog: force console verbose when reporting lockups
  profiling: fix sampling step on 64-bit big-endian systems
  kernel/reboot: avoid potential deadlocks during suspension
  compat: avoid double rounding in times()
  ocfs2: pin owning modules for open debugfs files
  ocfs2/cluster: initialize heartbeat regions before publishing them
  selftests/proc: proc-pid-vm: fix unused variable warning on non-x86
  ocfs2: pin refcount trees before dropping the lookup lock
  ocfs2: validate the xattr tree root of an indexed xattr block
  ocfs2/dlm: hold the lookup reference across convert AST enqueue
  ...
xor: add missing vzeroupper to AVX code 2026-10-07T02:02:58+00:00 Eric Biggers ebiggers@kernel.org 2026-08-31T21:22:48+00:00 7b8fc26c40d6cf4c6751a045c9e42bbb7e78d81b Since the AVX optimized XOR code uses YMM registers, execute vzeroupper before returning from it. This is needed to avoid degrading the performance of any later SSE code that may happen to be executed. Link: https://lore.kernel.org/20260831212248.213805-1-ebiggers@kernel.org Fixes: ea4d26ae24e5 ("raid5: add AVX optimized RAID5 checksumming") Signed-off-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Hellwig <hch@lst.de> Cc: <stable@vger.kernel.org> 
Since the AVX optimized XOR code uses YMM registers, execute vzeroupper
before returning from it.  This is needed to avoid degrading the
performance of any later SSE code that may happen to be executed.

Link: https://lore.kernel.org/20260831212248.213805-1-ebiggers@kernel.org
Fixes: ea4d26ae24e5 ("raid5: add AVX optimized RAID5 checksumming")
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <stable@vger.kernel.org>
xor: Add AVX-512 optimized xor_gen() 2026-09-10T14:26:19+00:00 Eric Biggers ebiggers@kernel.org 2026-09-01T14:57:40+00:00 c0a44d1745d3f209e4840b78ab75274fb74f01a0 Add an implementation of xor_gen() using AVX-512. It uses 512-bit vectors, i.e. ZMM registers. It also uses the vpternlogq instruction to do three-input XORs when applicable. It's enabled on x86_64 CPUs that have AVX512F && !PREFER_YMM. In practice that means: - AMD Zen 4 and later (client and server) - Intel Sapphire Rapids and later (server) - Intel Rocket Lake (client) - Intel Nova Lake and later (client) The !PREFER_YMM condition excludes the older AVX-512 implementations in Intel Skylake Server and Intel Ice Lake. They could run this code, but they're known to have overly-eager downclocking when ZMM registers are used. This is the same policy that the crypto and CRC code uses. Results from xor_benchmark on AMD Ryzen 9 9950X (Zen 5): Before: # xor_benchmark: 4096 bytes 16384 bytes # xor_benchmark: 4 disks: 256 GB/s 185 GB/s # xor_benchmark: 5 disks: 233 GB/s 165 GB/s # xor_benchmark: 6 disks: 243 GB/s 174 GB/s # xor_benchmark: 7 disks: 244 GB/s 176 GB/s # xor_benchmark: 8 disks: 265 GB/s 179 GB/s # xor_benchmark: 10 disks: 249 GB/s 175 GB/s # xor_benchmark: 12 disks: 219 GB/s 173 GB/s # xor_benchmark: 15 disks: 206 GB/s 177 GB/s # xor_benchmark: 16 disks: 212 GB/s 180 GB/s # xor_benchmark: 32 disks: 193 GB/s 177 GB/s After: # xor_benchmark: 4096 bytes 16384 bytes # xor_benchmark: 4 disks: 492 GB/s 202 GB/s # xor_benchmark: 5 disks: 436 GB/s 191 GB/s # xor_benchmark: 6 disks: 466 GB/s 193 GB/s # xor_benchmark: 7 disks: 491 GB/s 194 GB/s # xor_benchmark: 8 disks: 513 GB/s 205 GB/s # xor_benchmark: 10 disks: 454 GB/s 199 GB/s # xor_benchmark: 12 disks: 330 GB/s 204 GB/s # xor_benchmark: 15 disks: 266 GB/s 198 GB/s # xor_benchmark: 16 disks: 243 GB/s 177 GB/s # xor_benchmark: 32 disks: 187 GB/s 165 GB/s Signed-off-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: David Laight <david.laight.linux@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Christoph Hellwig <hch@lst.de> Link: https://patch.msgid.link/20260901145740.42337-9-ebiggers@kernel.org 
Add an implementation of xor_gen() using AVX-512.

It uses 512-bit vectors, i.e. ZMM registers.  It also uses the
vpternlogq instruction to do three-input XORs when applicable.

It's enabled on x86_64 CPUs that have AVX512F && !PREFER_YMM.  In
practice that means:

    - AMD Zen 4 and later (client and server)
    - Intel Sapphire Rapids and later (server)
    - Intel Rocket Lake (client)
    - Intel Nova Lake and later (client)

The !PREFER_YMM condition excludes the older AVX-512 implementations in
Intel Skylake Server and Intel Ice Lake.  They could run this code, but
they're known to have overly-eager downclocking when ZMM registers are
used.  This is the same policy that the crypto and CRC code uses.

Results from xor_benchmark on AMD Ryzen 9 9950X (Zen 5):

Before:

    # xor_benchmark:           	 4096 bytes	16384 bytes
    # xor_benchmark:   4 disks:	  256  GB/s	  185  GB/s
    # xor_benchmark:   5 disks:	  233  GB/s	  165  GB/s
    # xor_benchmark:   6 disks:	  243  GB/s	  174  GB/s
    # xor_benchmark:   7 disks:	  244  GB/s	  176  GB/s
    # xor_benchmark:   8 disks:	  265  GB/s	  179  GB/s
    # xor_benchmark:  10 disks:	  249  GB/s	  175  GB/s
    # xor_benchmark:  12 disks:	  219  GB/s	  173  GB/s
    # xor_benchmark:  15 disks:	  206  GB/s	  177  GB/s
    # xor_benchmark:  16 disks:	  212  GB/s	  180  GB/s
    # xor_benchmark:  32 disks:	  193  GB/s	  177  GB/s

After:

    # xor_benchmark:           	 4096 bytes	16384 bytes
    # xor_benchmark:   4 disks:	  492  GB/s	  202  GB/s
    # xor_benchmark:   5 disks:	  436  GB/s	  191  GB/s
    # xor_benchmark:   6 disks:	  466  GB/s	  193  GB/s
    # xor_benchmark:   7 disks:	  491  GB/s	  194  GB/s
    # xor_benchmark:   8 disks:	  513  GB/s	  205  GB/s
    # xor_benchmark:  10 disks:	  454  GB/s	  199  GB/s
    # xor_benchmark:  12 disks:	  330  GB/s	  204  GB/s
    # xor_benchmark:  15 disks:	  266  GB/s	  198  GB/s
    # xor_benchmark:  16 disks:	  243  GB/s	  177  GB/s
    # xor_benchmark:  32 disks:	  187  GB/s	  165  GB/s

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: David Laight <david.laight.linux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260901145740.42337-9-ebiggers@kernel.org
xor: Remove redundant X86_FEATURE_OSXSAVE check 2026-09-10T14:26:19+00:00 Eric Biggers ebiggers@kernel.org 2026-09-01T14:57:39+00:00 2405d15e5ae469bd9ae88ab0381f03e07787742f X86_FEATURE_AVX implies X86_FEATURE_OSXSAVE already. Signed-off-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Christoph Hellwig <hch@lst.de> Link: https://patch.msgid.link/20260901145740.42337-8-ebiggers@kernel.org 
X86_FEATURE_AVX implies X86_FEATURE_OSXSAVE already.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260901145740.42337-8-ebiggers@kernel.org
xor/kunit: add a benchmark 2026-08-04T04:10:15+00:00 Christoph Hellwig hch@lst.de 2026-07-15T14:47:35+00:00 874d2edd07dbc29301bb2d48da66d09d641b5ff5 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 <hch@lst.de> Cc: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
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 <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
xor/kunit: fix a spelling error 2026-08-04T04:10:15+00:00 Christoph Hellwig hch@lst.de 2026-07-15T14:47:34+00:00 75182f8d5732dcd5897665dcc86e7ea17b276a0b Link: https://lore.kernel.org/20260715144825.95432-4-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
Link: https://lore.kernel.org/20260715144825.95432-4-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
xor: improve the runtime selection benchmark 2026-08-04T04:10:15+00:00 Christoph Hellwig hch@lst.de 2026-07-15T14:47:33+00:00 2bfd85fd81cbec449469d3ea9c22d36e0a792bd1 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 <hch@lst.de> Cc: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
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 <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
xor: enable lock context analysis 2026-08-04T04:10:15+00:00 Christoph Hellwig hch@lst.de 2026-07-15T14:47:32+00:00 b6a1359bbe27a9fdb0c27d9cce962f5b9e53e61d 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 <hch@lst.de> Cc: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
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 <hch@lst.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Merge tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 2026-06-21T20:20:19+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-06-21T20:20:19+00:00 2e05544060b9fef5d4d0e0172944e6956c55080f Pull non-MM updates from Andrew Morton: - "taskstats: fix TGID dead-thread stat retention" (Yiyang Chen) Fix a taskstats TGID aggregation bug where fields added in the TGID query path were not preserved after thread exit, and adds a kselftest covering the regression. - "lib/tests: string_helpers: Slight improvements" (Andy Shevchenko) Improve lib/tests/string_helpers_kunit.c a little - "lib/base64: decode fixes" (Josh Law) Address minor issues in lib/base64.c - "selftests/filelock: Make output more kselftestish" (Mark Brown) Make the output from the ofdlocks test a bit easier for tooling to work with. Also ignore the generated file - "uaccess: unify inline vs outline copy_{from,to}_user() selection" (Yury Norov) Simplify the usercopy code by removing the selectability of inlining copy_{from,to}_user(). - "ocfs2: validate inline xattr header consumers" (ZhengYuan Huang) Fix a number of possible issues in the ocfs2 xattr code - "lib and lib/cmdline enhancements" (Dmitry Antipov) Provide additional robustness checking in the cmdline handling code and its in-kernel testing and selftests - "cleanup the RAID6 P/Q library" (Christoph Hellwig) Clean up the RAID6 P/Q library to match the recent updates to the RAID 5 XOR library and other CRC/crypto libraries - "ocfs2: harden inode validators against forged metadata" (Michael Bommarito) Add three structural checks to OCFS2 dinode validation so malformed on-disk fields are rejected before ocfs2_populate_inode() copies them into the in-core inode - "lib/raid: replace __get_free_pages() call with kmalloc()" (Mike Rapoport) Clean up the lib/raid code by using kmalloc() in more places * tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (108 commits) ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits lib: interval_tree_test: validate benchmark parameters ocfs2: avoid moving extents to occupied clusters treewide: fix transposed "sign" typos and update spelling.txt ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec fat: reject BPB volumes whose data area starts beyond total sectors selftests/uevent: increase __UEVENT_BUFFER_SIZE to avoid ENOBUFS on busy systems lib/test_firmware: allocate the configured into_buf size fs: efs: remove unneeded debug prints checkpatch: cuppress warnings when Reported-by: is followed by Link: MAINTAINERS: add Alexander as a kcov reviewer mailmap: update Alexander Sverdlin's Email addresses fs: fat: inode: replace sprintf() with scnprintf() ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent ocfs2: fix race between ocfs2_control_install_private() and ocfs2_control_release() ocfs2/dlm: require a ref for locking_state debugfs open ocfs2: reject FITRIM ranges shorter than a cluster ocfs2: validate fast symlink target during inode read ocfs2: add journal NULL check in ocfs2_checkpoint_inode() ... 
Pull non-MM updates from Andrew Morton:

 - "taskstats: fix TGID dead-thread stat retention" (Yiyang Chen)

   Fix a taskstats TGID aggregation bug where fields added in the TGID
   query path were not preserved after thread exit, and adds a kselftest
   covering the regression.

 - "lib/tests: string_helpers: Slight improvements" (Andy Shevchenko)

   Improve lib/tests/string_helpers_kunit.c a little

 - "lib/base64: decode fixes" (Josh Law)

   Address minor issues in lib/base64.c

 - "selftests/filelock: Make output more kselftestish" (Mark Brown)

   Make the output from the ofdlocks test a bit easier for tooling to
   work with. Also ignore the generated file

 - "uaccess: unify inline vs outline copy_{from,to}_user() selection"
   (Yury Norov)

   Simplify the usercopy code by removing the selectability of inlining
   copy_{from,to}_user().

 - "ocfs2: validate inline xattr header consumers" (ZhengYuan Huang)

   Fix a number of possible issues in the ocfs2 xattr code

 - "lib and lib/cmdline enhancements" (Dmitry Antipov)

   Provide additional robustness checking in the cmdline handling code
   and its in-kernel testing and selftests

 - "cleanup the RAID6 P/Q library" (Christoph Hellwig)

   Clean up the RAID6 P/Q library to match the recent updates to the
   RAID 5 XOR library and other CRC/crypto libraries

 - "ocfs2: harden inode validators against forged metadata" (Michael
   Bommarito)

   Add three structural checks to OCFS2 dinode validation so malformed
   on-disk fields are rejected before ocfs2_populate_inode() copies them
   into the in-core inode

 - "lib/raid: replace __get_free_pages() call with kmalloc()" (Mike
   Rapoport)

   Clean up the lib/raid code by using kmalloc() in more places

* tag 'mm-nonmm-stable-2026-06-21-10-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (108 commits)
  ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write
  ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits
  lib: interval_tree_test: validate benchmark parameters
  ocfs2: avoid moving extents to occupied clusters
  treewide: fix transposed "sign" typos and update spelling.txt
  ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec
  fat: reject BPB volumes whose data area starts beyond total sectors
  selftests/uevent: increase __UEVENT_BUFFER_SIZE to avoid ENOBUFS on busy systems
  lib/test_firmware: allocate the configured into_buf size
  fs: efs: remove unneeded debug prints
  checkpatch: cuppress warnings when Reported-by: is followed by Link:
  MAINTAINERS: add Alexander as a kcov reviewer
  mailmap: update Alexander Sverdlin's Email addresses
  fs: fat: inode: replace sprintf() with scnprintf()
  ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent
  ocfs2: fix race between ocfs2_control_install_private() and ocfs2_control_release()
  ocfs2/dlm: require a ref for locking_state debugfs open
  ocfs2: reject FITRIM ranges shorter than a cluster
  ocfs2: validate fast symlink target during inode read
  ocfs2: add journal NULL check in ocfs2_checkpoint_inode()
  ...
xor: use kmalloc() in calibrate_xor_blocks() 2026-06-04T21:49:27+00:00 Mike Rapoport (Microsoft) rppt@kernel.org 2026-05-28T09:53:00+00:00 d280a26a983f62bfeff3f134f9d5ba4035356b43 Patch series "lib/raid: replace __get_free_pages() call with kmalloc()", v4. The xor benchmark allocates 4 pages for a scratch buffer that is used purely as a CPU-only XOR working area. This buffer can be allocated with kmalloc() as there's nothing special about it to go directly to the page allocator. kmalloc() provides a better API than ancient __get_free_pages(). kmalloc() does not require ugly casts and kfree() does not need to know the size of the freed object. There is no performance difference because kmalloc() redirects allocations of such size to the page allocator. Replace __get_free_pages() call with kmalloc(). This patch (of 2): The xor benchmark allocates 4 pages for a scratch buffer that is used purely as a CPU-only XOR working area. This buffer can be allocated with kmalloc() as there's nothing special about it to go directly to the page allocator. kmalloc() provides a better API than ancient __get_free_pages(). kmalloc() does not require ugly casts and kfree() does not need to know the size of the freed object. There is no performance difference because kmalloc() redirects allocations of such size to the page allocator. Replace __get_free_pages() call with kmalloc(). Link: https://lore.kernel.org/20260528-lib-v4-0-4e3ad1277279@kernel.org Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com Link: https://lore.kernel.org/20260528-lib-v4-1-4e3ad1277279@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Hellwig <hch@infradead.org> Cc: Li Nan <linan122@huawei.com> Cc: Song Liu <song@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
Patch series "lib/raid: replace __get_free_pages() call with kmalloc()", v4.

The xor benchmark allocates 4 pages for a scratch buffer that is used
purely as a CPU-only XOR working area.

This buffer can be allocated with kmalloc() as there's nothing special
about it to go directly to the page allocator.

kmalloc() provides a better API than ancient __get_free_pages(). 
kmalloc() does not require ugly casts and kfree() does not need to know
the size of the freed object.

There is no performance difference because kmalloc() redirects allocations
of such size to the page allocator.

Replace __get_free_pages() call with kmalloc().


This patch (of 2):

The xor benchmark allocates 4 pages for a scratch buffer that is used
purely as a CPU-only XOR working area.

This buffer can be allocated with kmalloc() as there's nothing special
about it to go directly to the page allocator.

kmalloc() provides a better API than ancient __get_free_pages().
kmalloc() does not require ugly casts and kfree() does not need to know the
size of the freed object.

There is no performance difference because kmalloc() redirects allocations
of such size to the page allocator.

Replace __get_free_pages() call with kmalloc().

Link: https://lore.kernel.org/20260528-lib-v4-0-4e3ad1277279@kernel.org
Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Link: https://lore.kernel.org/20260528-lib-v4-1-4e3ad1277279@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Li Nan <linan122@huawei.com>
Cc: Song Liu <song@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>