This series converts memcg stats to be irq safe i.e. memcg stats can be updated in any context (task, softirq or hardirq) without disabling the irqs. This is still an RFC as I am not satisfied with the usage of atomic_* ops in memcg_rstat_updated(). Second I still need to run performance benchmarks (any suggestions/recommendations would be appreciated). Sending this out early to get feedback. This is based on latest mm-everything branch along with the nmi-safe memcg series [1]. Link: http://lore.kernel.org/20250509232859.657525-1-shakeel.butt@xxxxxxxxx Shakeel Butt (7): memcg: memcg_rstat_updated re-entrant safe against irqs memcg: move preempt disable to callers of memcg_rstat_updated memcg: make mod_memcg_state re-entrant safe against irqs memcg: make count_memcg_events re-entrant safe against irqs memcg: make __mod_memcg_lruvec_state re-entrant safe against irqs memcg: objcg stock trylock without irq disabling memcg: no stock lock for cpu hot-unplug include/linux/memcontrol.h | 41 +-------- mm/memcontrol-v1.c | 6 +- mm/memcontrol.c | 167 +++++++++++++++---------------------- mm/swap.c | 8 +- mm/vmscan.c | 14 ++-- 5 files changed, 85 insertions(+), 151 deletions(-) -- 2.47.1
