Re: [PATCH] memcg: cleanup racy sum avoidance code

[Roman Gushchin]

On Tue, Jul 27, 2021 at 06:22:43PM -0700, Shakeel Butt wrote:
> We used to have per-cpu memcg and lruvec stats and the readers have to
> traverse and sum the stats from each cpu. This summing was racy and may
> expose transient negative values. So, an explicit check was added to
> avoid such scenarios. Now these stats are moved to rstat infrastructure
> and are no more per-cpu, so we can remove the fixup for transient
> negative values.
> 
> Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>

Acked-by: Roman Gushchin <guro@xxxxxx>

Thanks!