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mm: memcontrol: add "sock" to cgroup2 memory.stat 

Provide statistics on how much of a cgroup's memory footprint is made up
of socket buffers from network connections owned by the group.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Vladimir Davydov <vdavydov@virtuozzo.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 2016-01-20 15:03:22 -08:00 committed by Linus Torvalds
parent 587d9f726a
commit b2807f07f4
2 changed files with 10 additions and 1 deletions
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5
include/linux/memcontrol.h
View File

@ -50,6 +50,9 @@ enum mem_cgroup_stat_index {
MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */
MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */
MEM_CGROUP_STAT_NSTATS,
/* default hierarchy stats */
MEMCG_SOCK,
MEMCG_NR_STAT,
};
struct mem_cgroup_reclaim_cookie {
@ -87,7 +90,7 @@ enum mem_cgroup_events_target {
#ifdef CONFIG_MEMCG
struct mem_cgroup_stat_cpu {
long count[MEM_CGROUP_STAT_NSTATS];
long count[MEMCG_NR_STAT];
unsigned long events[MEMCG_NR_EVENTS];
unsigned long nr_page_events;
unsigned long targets[MEM_CGROUP_NTARGETS];

6
mm/memcontrol.c
View File

@ -5128,6 +5128,8 @@ static int memory_stat_show(struct seq_file *m, void *v)
(u64)tree_stat(memcg, MEM_CGROUP_STAT_RSS) * PAGE_SIZE);
seq_printf(m, "file %llu\n",
(u64)tree_stat(memcg, MEM_CGROUP_STAT_CACHE) * PAGE_SIZE);
seq_printf(m, "sock %llu\n",
(u64)tree_stat(memcg, MEMCG_SOCK) * PAGE_SIZE);
seq_printf(m, "file_mapped %llu\n",
(u64)tree_stat(memcg, MEM_CGROUP_STAT_FILE_MAPPED) *
@ -5631,6 +5633,8 @@ bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
if (in_softirq())
gfp_mask = GFP_NOWAIT;
this_cpu_add(memcg->stat->count[MEMCG_SOCK], nr_pages);
if (try_charge(memcg, gfp_mask, nr_pages) == 0)
return true;
@ -5650,6 +5654,8 @@ void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
return;
}
this_cpu_sub(memcg->stat->count[MEMCG_SOCK], nr_pages);
page_counter_uncharge(&memcg->memory, nr_pages);
css_put_many(&memcg->css, nr_pages);
}