Michal Hocko wrote: > On Fri 29-01-16 19:35:18, Tetsuo Handa wrote: > > 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> > > > --- > > > mm/vmscan.c | 14 +++++++------- > > > 1 file changed, 7 insertions(+), 7 deletions(-) > > > > > > > I didn't know http://lkml.kernel.org/r/20151021130323.gc8...@dhcp22.suse.cz > > was forgotten. Anyway, > > OK, that explains why this sounded so familiar. Sorry I comepletely > forgot about it. > > > Acked-by: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp> > > Can I change it to your Signed-off-by?
No problem. > > -- > Michal Hocko > SUSE Labs >
