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authorPavel Emelyanov <xemul@openvz.org>2008-04-29 12:00:21 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 19:06:10 +0400
commit29f2a4dac856e9433a502b05b40e8e90385d8e27 (patch)
tree242772a246a6a5170ed5183d3fe3944a6f36a169 /include/linux/res_counter.h
parent85cc59db12724e1248f5e4841e61339cf485d5c7 (diff)
downloadlinux-29f2a4dac856e9433a502b05b40e8e90385d8e27.tar.xz
memcgroup: implement failcounter reset
This is a very common requirement from people using the resource accounting facilities (not only memcgroup but also OpenVZ beancounters). They want to put the cgroup in an initial state without re-creating it. For example after re-configuring a group people want to observe how this new configuration fits the group needs without saving the previous failcnt value. Merge two resets into one mem_cgroup_reset() function to demonstrate how multiplexing work. Besides, I have plans to move the files, that correspond to res_counter to the res_counter.c file and somehow "import" them into controller. I don't know how to make it gracefully yet, but merging resets of max_usage and failcnt in one function will be there for sure. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/res_counter.h')
-rw-r--r--include/linux/res_counter.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index 629d0ea2d073..6d9e1fca098c 100644
--- a/include/linux/res_counter.h
+++ b/include/linux/res_counter.h
@@ -143,4 +143,12 @@ static inline void res_counter_reset_max(struct res_counter *cnt)
spin_unlock_irqrestore(&cnt->lock, flags);
}
+static inline void res_counter_reset_failcnt(struct res_counter *cnt)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cnt->lock, flags);
+ cnt->failcnt = 0;
+ spin_unlock_irqrestore(&cnt->lock, flags);
+}
#endif