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SubjectRe: [PATCH v1 9/9] memcg: do not modify rstat tree for zero updates
On Tue, Mar 28, 2023 at 06:16:38AM +0000, Yosry Ahmed wrote:
> In some situations, we may end up calling memcg_rstat_updated() with a
> value of 0, which means the stat was not actually updated. An example is
> if we fail to reclaim any pages in shrink_folio_list().
>
> Do not add the cgroup to the rstat updated tree in this case, to avoid
> unnecessarily flushing it.
>
> Signed-off-by: Yosry Ahmed <yosryahmed@google.com>

Acked-by: Johannes Weiner <hannes@cmpxchg.org>

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