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[v4,0/2] mm: slub: Enhanced debugging in slub error

Message ID 20250226081206.680495-1-hyesoo.yu@samsung.com (mailing list archive)
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Series mm: slub: Enhanced debugging in slub error | expand

Message

Hyesoo Yu Feb. 26, 2025, 8:11 a.m. UTC 
Dear Maintainer,

The purpose is to improve the debugging capabilities of the slub allocator
when a error occurs. The following improvements have been made:

 - Added WARN() calls at specific locations (slab_err, object_err) to detect
errors effectively and to generate a crash dump if panic_on_warn is enabled.

 - Additionally, the error printing location in check_object has been adjusted to
display the broken data before the restoration process. This improvement
allows for a better understanding of how the data was corrupted.

This series combines two patches that were discussed seperately in the links below.
https://lore.kernel.org/linux-mm/20250120082908.4162780-1-hyesoo.yu@samsung.com/
https://lore.kernel.org/linux-mm/20250120083023.4162932-1-hyesoo.yu@samsung.com/

Thanks you.

version 2 changes
 - Replaced direct calling of BUG_ON with the use of WARN() to trigger a panic.
 - Modified the code to print the broken data only once before the restore.

version 3 changes
 - Moved WARN() from slab_fix to slab_err and object to call WARN on all error
 reporting paths.
 - Changed the parameter type of check_bytes_and_report.

version 4 changes
 - Modified the print format to include specific error names.
 - Removed the redundant warning by removing WARN() in kmem_cache_destroy

Hyesoo Yu (2):
  mm: slub: Print the broken data before restoring slub.
  mm: slub: call WARN() when the slab detect an error

 mm/slab_common.c |  3 ---
 mm/slub.c        | 63 +++++++++++++++++++++++++-----------------------
 2 files changed, 33 insertions(+), 33 deletions(-)