This is a note to let you know that I've just added the patch titled
memcg: free spare array to avoid memory leak
to the 3.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
memcg-free-spare-array-to-avoid-memory-leak.patch
and it can be found in the queue-3.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 8c7577637ca31385e92769a77e2ab5b428e8b99c Mon Sep 17 00:00:00 2001
From: Sha Zhengju <[email protected]>
Date: Thu, 10 May 2012 13:01:45 -0700
Subject: memcg: free spare array to avoid memory leak
From: Sha Zhengju <[email protected]>
commit 8c7577637ca31385e92769a77e2ab5b428e8b99c upstream.
When the last event is unregistered, there is no need to keep the spare
array anymore. So free it to avoid memory leak.
Signed-off-by: Sha Zhengju <[email protected]>
Acked-by: KAMEZAWA Hiroyuki <[email protected]>
Reviewed-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
mm/memcontrol.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4480,6 +4480,12 @@ static void mem_cgroup_usage_unregister_
swap_buffers:
/* Swap primary and spare array */
thresholds->spare = thresholds->primary;
+ /* If all events are unregistered, free the spare array */
+ if (!new) {
+ kfree(thresholds->spare);
+ thresholds->spare = NULL;
+ }
+
rcu_assign_pointer(thresholds->primary, new);
/* To be sure that nobody uses thresholds */
Patches currently in stable-queue which might be from [email protected] are
queue-3.3/memcg-free-spare-array-to-avoid-memory-leak.patch
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