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| author | Glauber Costa <glommer@parallels.com> | 2012-12-18 14:23:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-18 15:02:14 -0800 |
| commit | 749c54151a6e5b229e4ae067dbc651e54b161fbc (patch) | |
| tree | 8d2d858e76e44d1bbf64439c189a57c18c8e60ae /mm/slab_common.c | |
| parent | 22933152934f30de6f05b600c03f8a08f853a8d2 (diff) | |
| download | linux-749c54151a6e5b229e4ae067dbc651e54b161fbc.tar.bz2 | |
memcg: aggregate memcg cache values in slabinfo
When we create caches in memcgs, we need to display their usage
information somewhere. We'll adopt a scheme similar to /proc/meminfo,
with aggregate totals shown in the global file, and per-group information
stored in the group itself.
For the time being, only reads are allowed in the per-group cache.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@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>
Diffstat (limited to 'mm/slab_common.c')
| -rw-r--r-- | mm/slab_common.c | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 080a43804bf1..081f1b8d9a7b 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -322,7 +322,7 @@ struct kmem_cache *__init create_kmalloc_cache(const char *name, size_t size, #ifdef CONFIG_SLABINFO -static void print_slabinfo_header(struct seq_file *m) +void print_slabinfo_header(struct seq_file *m) { /* * Output format version, so at least we can change it @@ -366,16 +366,43 @@ static void s_stop(struct seq_file *m, void *p) mutex_unlock(&slab_mutex); } -static int s_show(struct seq_file *m, void *p) +static void +memcg_accumulate_slabinfo(struct kmem_cache *s, struct slabinfo *info) +{ + struct kmem_cache *c; + struct slabinfo sinfo; + int i; + + if (!is_root_cache(s)) + return; + + for_each_memcg_cache_index(i) { + c = cache_from_memcg(s, i); + if (!c) + continue; + + memset(&sinfo, 0, sizeof(sinfo)); + get_slabinfo(c, &sinfo); + + info->active_slabs += sinfo.active_slabs; + info->num_slabs += sinfo.num_slabs; + info->shared_avail += sinfo.shared_avail; + info->active_objs += sinfo.active_objs; + info->num_objs += sinfo.num_objs; + } +} + +int cache_show(struct kmem_cache *s, struct seq_file *m) { - struct kmem_cache *s = list_entry(p, struct kmem_cache, list); struct slabinfo sinfo; memset(&sinfo, 0, sizeof(sinfo)); get_slabinfo(s, &sinfo); + memcg_accumulate_slabinfo(s, &sinfo); + seq_printf(m, "%-17s %6lu %6lu %6u %4u %4d", - s->name, sinfo.active_objs, sinfo.num_objs, s->size, + cache_name(s), sinfo.active_objs, sinfo.num_objs, s->size, sinfo.objects_per_slab, (1 << sinfo.cache_order)); seq_printf(m, " : tunables %4u %4u %4u", @@ -387,6 +414,15 @@ static int s_show(struct seq_file *m, void *p) return 0; } +static int s_show(struct seq_file *m, void *p) +{ + struct kmem_cache *s = list_entry(p, struct kmem_cache, list); + + if (!is_root_cache(s)) + return 0; + return cache_show(s, m); +} + /* * slabinfo_op - iterator that generates /proc/slabinfo * |