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Message-Id: <1265846123-2244-1-git-send-email-kirill@shutemov.name> Date: Thu, 11 Feb 2010 01:55:23 +0200 From: "Kirill A. Shutemov" <kirill@...temov.name> To: linux-mm@...ck.org Cc: linux-kernel@...r.kernel.org, "Kirill A. Shutemov" <kirill@...temov.name>, Balbir Singh <balbir@...ux.vnet.ibm.com>, Pavel Emelyanov <xemul@...nvz.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Subject: [PATCH mmotm] memcg: check if first threshold crossed There is a bug in memory thresholds code. We don't check if first threshold (array index 0) was crossed down. This patch fixes it. Signed-off-by: Kirill A. Shutemov <kirill@...temov.name> Cc: Balbir Singh <balbir@...ux.vnet.ibm.com> Cc: Pavel Emelyanov <xemul@...nvz.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> --- mm/memcontrol.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 41e00c2..a443c30 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3252,7 +3252,7 @@ static void __mem_cgroup_threshold(struct mem_cgroup *memcg, bool swap) * If none of thresholds below usage is crossed, we read * only one element of the array here. */ - for (; i > 0 && unlikely(t->entries[i].threshold > usage); i--) + for (; i >= 0 && unlikely(t->entries[i].threshold > usage); i--) eventfd_signal(t->entries[i].eventfd, 1); /* i = current_threshold + 1 */ -- 1.6.5.8 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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