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mm: memcg: print statistics directly to seq_file 

Being able to use seq_printf() allows being smarter about statistics
name strings, which are currently listed twice, with the only difference
being a "total_" prefix on the hierarchical version.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ying Han <yinghan@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2012-05-29 15:07:06 -07:00 committed by Linus Torvalds
parent fada52ca0e
commit 78ccf5b5ab
1 changed files with 27 additions and 28 deletions
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55
mm/memcontrol.c
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@ -4060,26 +4060,22 @@ struct mcs_total_stat {
s64 stat[NR_MCS_STAT];
};
static struct {
char *local_name;
char *total_name;
} memcg_stat_strings[NR_MCS_STAT] = {
{"cache", "total_cache"},
{"rss", "total_rss"},
{"mapped_file", "total_mapped_file"},
{"pgpgin", "total_pgpgin"},
{"pgpgout", "total_pgpgout"},
{"swap", "total_swap"},
{"pgfault", "total_pgfault"},
{"pgmajfault", "total_pgmajfault"},
{"inactive_anon", "total_inactive_anon"},
{"active_anon", "total_active_anon"},
{"inactive_file", "total_inactive_file"},
{"active_file", "total_active_file"},
{"unevictable", "total_unevictable"}
static const char *memcg_stat_strings[NR_MCS_STAT] = {
"cache",
"rss",
"mapped_file",
"pgpgin",
"pgpgout",
"swap",
"pgfault",
"pgmajfault",
"inactive_anon",
"active_anon",
"inactive_file",
"active_file",
"unevictable",
};
static void
mem_cgroup_get_local_stat(struct mem_cgroup *memcg, struct mcs_total_stat *s)
{
@ -4175,7 +4171,7 @@ static int mem_control_numa_stat_show(struct cgroup *cont, struct cftype *cft,
#endif /* CONFIG_NUMA */
static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
struct cgroup_map_cb *cb)
struct seq_file *m)
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
struct mcs_total_stat mystat;
@ -4188,16 +4184,18 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
for (i = 0; i < NR_MCS_STAT; i++) {
if (i == MCS_SWAP && !do_swap_account)
continue;
cb->fill(cb, memcg_stat_strings[i].local_name, mystat.stat[i]);
seq_printf(m, "%s %llu\n", memcg_stat_strings[i],
(unsigned long long)mystat.stat[i]);
}
/* Hierarchical information */
{
unsigned long long limit, memsw_limit;
memcg_get_hierarchical_limit(memcg, &limit, &memsw_limit);
cb->fill(cb, "hierarchical_memory_limit", limit);
seq_printf(m, "hierarchical_memory_limit %llu\n", limit);
if (do_swap_account)
cb->fill(cb, "hierarchical_memsw_limit", memsw_limit);
seq_printf(m, "hierarchical_memsw_limit %llu\n",
memsw_limit);
}
memset(&mystat, 0, sizeof(mystat));
@ -4205,7 +4203,8 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
for (i = 0; i < NR_MCS_STAT; i++) {
if (i == MCS_SWAP && !do_swap_account)
continue;
cb->fill(cb, memcg_stat_strings[i].total_name, mystat.stat[i]);
seq_printf(m, "total_%s %llu\n", memcg_stat_strings[i],
(unsigned long long)mystat.stat[i]);
}
#ifdef CONFIG_DEBUG_VM
@ -4226,10 +4225,10 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
recent_scanned[0] += rstat->recent_scanned[0];
recent_scanned[1] += rstat->recent_scanned[1];
}
cb->fill(cb, "recent_rotated_anon", recent_rotated[0]);
cb->fill(cb, "recent_rotated_file", recent_rotated[1]);
cb->fill(cb, "recent_scanned_anon", recent_scanned[0]);
cb->fill(cb, "recent_scanned_file", recent_scanned[1]);
seq_printf(m, "recent_rotated_anon %lu\n", recent_rotated[0]);
seq_printf(m, "recent_rotated_file %lu\n", recent_rotated[1]);
seq_printf(m, "recent_scanned_anon %lu\n", recent_scanned[0]);
seq_printf(m, "recent_scanned_file %lu\n", recent_scanned[1]);
}
#endif
@ -4663,7 +4662,7 @@ static struct cftype mem_cgroup_files[] = {
},
{
.name = "stat",
.read_map = mem_control_stat_show,
.read_seq_string = mem_control_stat_show,
},
{
.name = "force_empty",