From ad4ca5f4b70236dab5e457ff6567d36f75d2e7c5 Mon Sep 17 00:00:00 2001 From: "Kirill A. Shutemov" Date: Thu, 7 Oct 2010 12:59:27 -0700 Subject: [PATCH] memcg: fix thresholds with use_hierarchy == 1 We need to check parent's thresholds if parent has use_hierarchy == 1 to be sure that parent's threshold events will be triggered even if parent itself is not active (no MEM_CGROUP_EVENTS). Signed-off-by: Kirill A. Shutemov Reviewed-by: Daisuke Nishimura Acked-by: KAMEZAWA Hiroyuki Acked-by: Balbir Singh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 3eed583895a6..9be3cf8a5da4 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3587,9 +3587,13 @@ unlock: static void mem_cgroup_threshold(struct mem_cgroup *memcg) { - __mem_cgroup_threshold(memcg, false); - if (do_swap_account) - __mem_cgroup_threshold(memcg, true); + while (memcg) { + __mem_cgroup_threshold(memcg, false); + if (do_swap_account) + __mem_cgroup_threshold(memcg, true); + + memcg = parent_mem_cgroup(memcg); + } } static int compare_thresholds(const void *a, const void *b) -- 2.20.1