Re: [PATCH v21 16/19] mm/swap.c: serialize memcg changes in pagevec_lru_move_fn

On 11/5/20 9:55 AM, Alex Shi wrote: Hugh Dickins' found a memcg change bug on original version: If we want to change the pgdat->lru_lock to memcg's lruvec lock, we have to serialize mem_cgroup_move_account during pagevec_lru_move_fn. The possible bad scenario would like: cpu 0

[PATCH v21 16/19] mm/swap.c: serialize memcg changes in pagevec_lru_move_fn

Hugh Dickins' found a memcg change bug on original version: If we want to change the pgdat->lru_lock to memcg's lruvec lock, we have to serialize mem_cgroup_move_account during pagevec_lru_move_fn. The possible bad scenario would like: cpu 0 cpu 1 lruvec