This patchset does a few things to aid in OOM debugging, in particular when shrinkers are involved: - improves the show_mem OOM report: it now reports on shrinkers, and for both shrinkers and slab we only report the top 10 entries, sorted, not the full list - add shrinker_to_text(), for the show_mem report and debugfs, and a an optional shrinker.to_text() callback to report extra driver-specific information - add extra counters for the shrinker_to_text() report - implement shrinker.to_text() for bcachefs, giving an example of how to use the callbacks Daniel Hill (1): bcachefs: add counters for failed shrinker reclaim Kent Overstreet (6): seq_buf: seq_buf_human_readable_u64() mm: shrinker: Add a .to_text() method for shrinkers mm: shrinker: Add new stats for .to_text() mm: Centralize & improve oom reporting in show_mem.c mm: shrinker: Add shrinker_to_text() to debugfs interface bcachefs: shrinker.to_text() methods fs/bcachefs/btree_cache.c | 102 +++++++++++++++++++++++++++------- fs/bcachefs/btree_cache.h | 2 +- fs/bcachefs/btree_key_cache.c | 14 +++++ fs/bcachefs/btree_types.h | 10 ++++ fs/bcachefs/sysfs.c | 2 +- include/linux/seq_buf.h | 4 ++ include/linux/shrinker.h | 12 +++- lib/seq_buf.c | 10 ++++ mm/oom_kill.c | 23 -------- mm/show_mem.c | 20 +++++++ mm/shrinker.c | 89 ++++++++++++++++++++++++++++- mm/shrinker_debug.c | 18 ++++++ mm/slab.h | 6 +- mm/slab_common.c | 52 ++++++++++++++--- 14 files changed, 305 insertions(+), 59 deletions(-) -- 2.42.0
