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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-04-29 01:00:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:10 -0700 |
| commit | 85cc59db12724e1248f5e4841e61339cf485d5c7 (patch) | |
| tree | 960340cafba30181a1e2f60c93cd54a6fdb637ff /mm/memcontrol.c | |
| parent | b6ac57d50a375aa2f267e1b2b56c46564a936d00 (diff) | |
| download | lwn-85cc59db12724e1248f5e4841e61339cf485d5c7.tar.gz lwn-85cc59db12724e1248f5e4841e61339cf485d5c7.zip | |
memcgroup: use triggers in force_empty and max_usage files
These two files are essentially event callbacks. They do not care about the
contents of the string, but only about the fact of the write itself.
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.c | 21 |
1 files changed, 6 insertions, 15 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index f4079692cbf5..dc3472f9f68c 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -857,27 +857,18 @@ static ssize_t mem_cgroup_write(struct cgroup *cont, struct cftype *cft, mem_cgroup_write_strategy); } -static ssize_t mem_cgroup_max_reset(struct cgroup *cont, struct cftype *cft, - struct file *file, const char __user *userbuf, - size_t nbytes, loff_t *ppos) +static int mem_cgroup_max_reset(struct cgroup *cont, unsigned int event) { struct mem_cgroup *mem; mem = mem_cgroup_from_cont(cont); res_counter_reset_max(&mem->res); - return nbytes; + return 0; } -static ssize_t mem_force_empty_write(struct cgroup *cont, - struct cftype *cft, struct file *file, - const char __user *userbuf, - size_t nbytes, loff_t *ppos) +static int mem_force_empty_write(struct cgroup *cont, unsigned int event) { - struct mem_cgroup *mem = mem_cgroup_from_cont(cont); - int ret = mem_cgroup_force_empty(mem); - if (!ret) - ret = nbytes; - return ret; + return mem_cgroup_force_empty(mem_cgroup_from_cont(cont)); } static const struct mem_cgroup_stat_desc { @@ -925,7 +916,7 @@ static struct cftype mem_cgroup_files[] = { { .name = "max_usage_in_bytes", .private = RES_MAX_USAGE, - .write = mem_cgroup_max_reset, + .trigger = mem_cgroup_max_reset, .read_u64 = mem_cgroup_read, }, { @@ -941,7 +932,7 @@ static struct cftype mem_cgroup_files[] = { }, { .name = "force_empty", - .write = mem_force_empty_write, + .trigger = mem_force_empty_write, }, { .name = "stat", |