linux-kernel - [PATCH v3 0/3] slab: fix and cleanup of slub

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Date: Fri, 07 Jun 2024 16:40:11 +0800
From: Chengming Zhou <chengming.zhou@...ux.dev>
To: Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>, 
 David Rientjes <rientjes@...gle.com>, Joonsoo Kim <iamjoonsoo.kim@....com>, 
 Andrew Morton <akpm@...ux-foundation.org>, Vlastimil Babka <vbabka@...e.cz>, 
 Roman Gushchin <roman.gushchin@...ux.dev>, 
 Hyeonggon Yoo <42.hyeyoo@...il.com>, Feng Tang <feng.tang@...el.com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, 
 zhouchengming@...edance.com, Chengming Zhou <chengming.zhou@...ux.dev>
Subject: [PATCH v3 0/3] slab: fix and cleanup of slub_debug

Changes in v3:
- Fix slub_kunit tests failures by using new introduced
  slab_in_kunit_test(), which doesn't increase slab_errors.
- Fix the condition of whether to check free pointer and
  set "ret" correctly.
- Collect Reviewed-by tags from Vlastimil Babka.
- Link to v2: https://lore.kernel.org/r/20240605-b4-slab-debug-v2-0-c535b9cd361c@linux.dev

Changes in v2:
- Change check_object() to do all the checks without skipping, report
  their specific error findings in check_bytes_and_report() but not
  print_trailer(). Once all checks were done, if any found an error,
  print the trailer once from check_object(), suggested by Vlastimil.
- Consolidate the two cases with flags & SLAB_RED_ZONE and make the
  complex conditional expressions a little prettier and add comments
  about extending right redzone, per Vlastimil.
- Add Reviewed-by from Feng Tang.
- Link to v1: https://lore.kernel.org/r/20240528-b4-slab-debug-v1-0-8694ef4802df@linux.dev

Hello,

This series includes minor fix and cleanup of slub_debug, please see
the commits for details.

Signed-off-by: Chengming Zhou <chengming.zhou@...ux.dev>
---
Chengming Zhou (3):
      slab: make check_object() more consistent
      slab: don't put freepointer outside of object if only orig_size
      slab: delete useless RED_INACTIVE and RED_ACTIVE

 include/linux/poison.h       |  7 ++--
 mm/slub.c                    | 77 ++++++++++++++++++++++++++++----------------
 tools/include/linux/poison.h |  7 ++--
 3 files changed, 53 insertions(+), 38 deletions(-)
---
base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0
change-id: 20240528-b4-slab-debug-1d8179fc996a

Best regards,
-- 
Chengming Zhou <chengming.zhou@...ux.dev>