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memory cgroup enhancements: add memory.stat file 

Show accounted information of memory cgroup by memory.stat file

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix printk warning]
Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Paul Menage <menage@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Kirill Korotaev <dev@sw.ru>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: David Rientjes <rientjes@google.com>
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KAMEZAWA Hiroyuki 2008-02-07 00:14:25 -08:00 committed by Linus Torvalds
parent d52aa412d4
commit d2ceb9b7dd
1 changed files with 48 additions and 0 deletions
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48
mm/memcontrol.c
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@ -29,6 +29,7 @@
#include <linux/swap.h>
#include <linux/spinlock.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
@ -794,6 +795,49 @@ static ssize_t mem_force_empty_read(struct cgroup *cont,
}
static const struct mem_cgroup_stat_desc {
const char *msg;
u64 unit;
} mem_cgroup_stat_desc[] = {
[MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
[MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
};
static int mem_control_stat_show(struct seq_file *m, void *arg)
{
struct cgroup *cont = m->private;
struct mem_cgroup *mem_cont = mem_cgroup_from_cont(cont);
struct mem_cgroup_stat *stat = &mem_cont->stat;
int i;
for (i = 0; i < ARRAY_SIZE(stat->cpustat[0].count); i++) {
s64 val;
val = mem_cgroup_read_stat(stat, i);
val *= mem_cgroup_stat_desc[i].unit;
seq_printf(m, "%s %lld\n", mem_cgroup_stat_desc[i].msg,
(long long)val);
}
return 0;
}
static const struct file_operations mem_control_stat_file_operations = {
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int mem_control_stat_open(struct inode *unused, struct file *file)
{
/* XXX __d_cont */
struct cgroup *cont = file->f_dentry->d_parent->d_fsdata;
file->f_op = &mem_control_stat_file_operations;
return single_open(file, mem_control_stat_show, cont);
}
static struct cftype mem_cgroup_files[] = {
{
.name = "usage_in_bytes",
@ -821,6 +865,10 @@ static struct cftype mem_cgroup_files[] = {
.write = mem_force_empty_write,
.read = mem_force_empty_read,
},
{
.name = "stat",
.open = mem_control_stat_open,
},
};
static struct mem_cgroup init_mem_cgroup;