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Koen Kooi
189ce92b4c
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
From 0b0f028ae418e6b772241ed68bee5f2d0c6bcb3a Mon Sep 17 00:00:00 2001
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From: Sha Zhengju <handai.szj@taobao.com>
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Date: Thu, 10 May 2012 13:01:45 -0700
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Subject: [PATCH 076/117] memcg: free spare array to avoid memory leak
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commit 8c7577637ca31385e92769a77e2ab5b428e8b99c upstream.
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When the last event is unregistered, there is no need to keep the spare
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array anymore. So free it to avoid memory leak.
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Signed-off-by: Sha Zhengju <handai.szj@taobao.com>
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Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
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Reviewed-by: Kirill A. Shutemov <kirill@shutemov.name>
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Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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---
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mm/memcontrol.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/mm/memcontrol.c b/mm/memcontrol.c
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index 778554f..c8425b1 100644
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--- a/mm/memcontrol.c
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+++ b/mm/memcontrol.c
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@@ -4549,6 +4549,12 @@ static void mem_cgroup_usage_unregister_event(struct cgroup *cgrp,
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swap_buffers:
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/* Swap primary and spare array */
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thresholds->spare = thresholds->primary;
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+ /* If all events are unregistered, free the spare array */
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+ if (!new) {
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+ kfree(thresholds->spare);
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+ thresholds->spare = NULL;
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+ }
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+
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rcu_assign_pointer(thresholds->primary, new);
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/* To be sure that nobody uses thresholds */
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--
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1.7.9.5
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