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SubjectRe: [PATCH] mm/vmstat: retrieve more accurate vmstat value
On Tue 24-11-15 15:22:03, Joonsoo Kim wrote:
> When I tested compaction in low memory condition, I found that
> my benchmark is stuck in congestion_wait() at shrink_inactive_list().
> This stuck last for 1 sec and after then it can escape. More investigation
> shows that it is due to stale vmstat value. vmstat is updated every 1 sec
> so it is stuck for 1 sec.

Wouldn't it be sufficient to use zone_page_state_snapshot in
too_many_isolated?
--
Michal Hocko
SUSE Labs


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