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| author | Shakeel Butt <[email protected]> | 2025-05-14 18:41:57 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2025-05-22 21:55:38 +0000 |
| commit | 0ccf1806d44f7c567c73d6ef076a8f6c8c16c74b (patch) | |
| tree | 999cd81eef1a459e6b8421857ac58ef956894e49 /lib/errseq.c | |
| parent | memcg: make __mod_memcg_lruvec_state re-entrant safe against irqs (diff) | |
| download | kernel-0ccf1806d44f7c567c73d6ef076a8f6c8c16c74b.tar.gz kernel-0ccf1806d44f7c567c73d6ef076a8f6c8c16c74b.zip | |
memcg: no stock lock for cpu hot-unplug
Previously on the cpu hot-unplug, the kernel would call drain_obj_stock()
with objcg local lock. However local lock was not needed as the stock
which was accessed belongs to a dead cpu but we kept it there to disable
irqs as drain_obj_stock() may call mod_objcg_mlstate() which required irqs
disabled. However there is no need to disable irqs now for
mod_objcg_mlstate(), so we can remove the local lock altogether from cpu
hot-unplug path.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Shakeel Butt <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'lib/errseq.c')
0 files changed, 0 insertions, 0 deletions