Ying, I noticed this at test. please fix the code in your set. == if low_wmark_distance = 0, mem_cgroup_watermark_ok() returns false when usage hits limit. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> --- mm/memcontrol.c | 3 +++ 1 file changed, 3 insertions(+) Index: mmotm-Apr14/mm/memcontrol.c =================================================================== --- mmotm-Apr14.orig/mm/memcontrol.c +++ mmotm-Apr14/mm/memcontrol.c @@ -5062,6 +5062,9 @@ int mem_cgroup_watermark_ok(struct mem_c long ret = 0; int flags = CHARGE_WMARK_LOW | CHARGE_WMARK_HIGH; + if (!mem->low_wmark_distance) + return 1; + VM_BUG_ON((charge_flags & flags) == flags); if (charge_flags & CHARGE_WMARK_LOW) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>