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authorPavel Emelyanov <xemul@openvz.org>2008-04-29 01:00:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 08:06:10 -0700
commit29f2a4dac856e9433a502b05b40e8e90385d8e27 (patch)
tree242772a246a6a5170ed5183d3fe3944a6f36a169 /mm/memcontrol.c
parent85cc59db12724e1248f5e4841e61339cf485d5c7 (diff)
downloadop-kernel-dev-29f2a4dac856e9433a502b05b40e8e90385d8e27.zip
op-kernel-dev-29f2a4dac856e9433a502b05b40e8e90385d8e27.tar.gz
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 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index dc3472f..f891876 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -857,12 +857,19 @@ static ssize_t mem_cgroup_write(struct cgroup *cont, struct cftype *cft,
mem_cgroup_write_strategy);
}
-static int mem_cgroup_max_reset(struct cgroup *cont, unsigned int event)
+static int mem_cgroup_reset(struct cgroup *cont, unsigned int event)
{
struct mem_cgroup *mem;
mem = mem_cgroup_from_cont(cont);
- res_counter_reset_max(&mem->res);
+ switch (event) {
+ case RES_MAX_USAGE:
+ res_counter_reset_max(&mem->res);
+ break;
+ case RES_FAILCNT:
+ res_counter_reset_failcnt(&mem->res);
+ break;
+ }
return 0;
}
@@ -916,7 +923,7 @@ static struct cftype mem_cgroup_files[] = {
{
.name = "max_usage_in_bytes",
.private = RES_MAX_USAGE,
- .trigger = mem_cgroup_max_reset,
+ .trigger = mem_cgroup_reset,
.read_u64 = mem_cgroup_read,
},
{
@@ -928,6 +935,7 @@ static struct cftype mem_cgroup_files[] = {
{
.name = "failcnt",
.private = RES_FAILCNT,
+ .trigger = mem_cgroup_reset,
.read_u64 = mem_cgroup_read,
},
{
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