Changes since v1: https://lore.kernel.org/all/20220225180318.20594-1-vbabka@xxxxxxx/ - New Patch 1 to resolve bootstrap issues between stack depot and early cache creation reported by Hyeonggon Yoo - Patch 3 use GFP_NOWAIT always in set_track to avoid sleeping in invalid context, reported by Hyeonggon Yoo - Addressed minor feedback and added review/tests by Hyeonggon Yoo. 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 3. Patch 1 makes it possible to use stack depot without bootstrap issues. Patch 2 is a new preparatory cleanup. Patch 3 originally submitted here [1], was merged to mainline but reverted for stackdepot related issues as explained in the patch. Patches 4-6 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-v2 I'd like to ask for some more review/testing 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: distinguish 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 (2): lib/stackdepot: allow requesting early initialization dynamically mm/slub: move struct track init out of set_track() Documentation/vm/slub.rst | 64 ++++++++++++++++++ include/linux/stackdepot.h | 16 ++++- init/Kconfig | 1 + lib/stackdepot.c | 2 + mm/page_owner.c | 9 ++- mm/slab_common.c | 5 ++ mm/slub.c | 135 +++++++++++++++++++++++++------------ 7 files changed, 183 insertions(+), 49 deletions(-) -- 2.35.1
