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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>