[PATCH 0/5] SLUB debugfs improvements based on stackdepot

[Vlastimil Babka]

Hi,

this series combines and revives patches from Oliver's last year
bachelor thesis (where I was the advisor) that make SLUB's debugfs
files alloc_traces and free_traces more useful.
The resubmission was blocked on stackdepot changes that are now merged,
as explained in patch 2.

Patch 1 is a new preparatory cleanup.

Patch 2 originally submitted here [1], was merged to mainline but
reverted for stackdepot related issues as explained in the patch.

Patches 3-5 originally submitted as RFC here [2]. In this submission I
have omitted the new file 'all_objects' (patch 3/3 in [2]) as it might
be considered too intrusive so I will postpone it for later. The docs
patch is adjusted accordingly.

Also available in git, based on v5.17-rc1:
https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=slub-stackdepot-v1

I'd like to ask for some review before I add this to the slab tree.

[1] https://lore.kernel.org/all/20210414163434.4376-1-glittao@xxxxxxxxx/
[2] https://lore.kernel.org/all/20210521121127.24653-1-glittao@xxxxxxxxx/

Oliver Glitta (4):
  mm/slub: use stackdepot to save stack trace in objects
  mm/slub: aggregate and print stack traces in debugfs files
  mm/slub: sort debugfs output by frequency of stack traces
  slab, documentation: add description of debugfs files for SLUB caches

Vlastimil Babka (1):
  mm/slub: move struct track init out of set_track()

 Documentation/vm/slub.rst |  61 +++++++++++++++
 init/Kconfig              |   1 +
 mm/slub.c                 | 152 +++++++++++++++++++++++++-------------
 3 files changed, 162 insertions(+), 52 deletions(-)

-- 
2.35.1