On Thu, 28 Jan 2016, Michal Hocko wrote: > From: Michal Hocko <mho...@suse.com> > > zone_reclaimable_pages is used in should_reclaim_retry which uses it to > calculate the target for the watermark check. This means that precise > numbers are important for the correct decision. zone_reclaimable_pages > uses zone_page_state which can contain stale data with per-cpu diffs > not synced yet (the last vmstat_update might have run 1s in the past). > > Use zone_page_state_snapshot in zone_reclaimable_pages instead. None > of the current callers is in a hot path where getting the precise value > (which involves per-cpu iteration) would cause an unreasonable overhead. > > Suggested-by: David Rientjes <rient...@google.com> > Signed-off-by: Michal Hocko <mho...@suse.com>
Acked-by: David Rientjes <rient...@google.com>
