The patch titled
Subject: mm: memcontrol: make tree_{stat,events} fetch all stats
has been removed from the -mm tree. Its filename was
mm-memcontrol-make-tree_statevents-fetch-all-stats.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Subject: mm: memcontrol: make tree_{stat,events} fetch all stats
Currently, tree_{stat,events} helpers can only get one stat index at a
time, so when there are a lot of stats to be reported one has to call it
over and over again (see memory_stat_show). This is neither effective,
nor does it look good. Instead, let's make these helpers take a snapshot
of all available counters.
Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 67 ++++++++++++++++++++++++++--------------------
1 file changed, 39 insertions(+), 28 deletions(-)
diff -puN mm/memcontrol.c~mm-memcontrol-make-tree_statevents-fetch-all-stats mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-make-tree_statevents-fetch-all-stats
+++ a/mm/memcontrol.c
@@ -2717,39 +2717,48 @@ static int mem_cgroup_hierarchy_write(st
return retval;
}
-static unsigned long tree_stat(struct mem_cgroup *memcg,
- enum mem_cgroup_stat_index idx)
+static void tree_stat(struct mem_cgroup *memcg, unsigned long *stat)
{
struct mem_cgroup *iter;
- unsigned long val = 0;
+ int i;
- for_each_mem_cgroup_tree(iter, memcg)
- val += mem_cgroup_read_stat(iter, idx);
+ memset(stat, 0, sizeof(*stat) * MEMCG_NR_STAT);
- return val;
+ for_each_mem_cgroup_tree(iter, memcg) {
+ for (i = 0; i < MEMCG_NR_STAT; i++)
+ stat[i] += mem_cgroup_read_stat(iter, i);
+ }
}
-static unsigned long tree_events(struct mem_cgroup *memcg,
- enum mem_cgroup_events_index idx)
+static void tree_events(struct mem_cgroup *memcg, unsigned long *events)
{
struct mem_cgroup *iter;
- unsigned long val = 0;
+ int i;
- for_each_mem_cgroup_tree(iter, memcg)
- val += mem_cgroup_read_events(iter, idx);
+ memset(events, 0, sizeof(*events) * MEMCG_NR_EVENTS);
- return val;
+ for_each_mem_cgroup_tree(iter, memcg) {
+ for (i = 0; i < MEMCG_NR_EVENTS; i++)
+ events[i] += mem_cgroup_read_events(iter, i);
+ }
}
static unsigned long mem_cgroup_usage(struct mem_cgroup *memcg, bool swap)
{
- unsigned long val;
+ unsigned long val = 0;
if (mem_cgroup_is_root(memcg)) {
- val = tree_stat(memcg, MEM_CGROUP_STAT_CACHE);
- val += tree_stat(memcg, MEM_CGROUP_STAT_RSS);
- if (swap)
- val += tree_stat(memcg, MEM_CGROUP_STAT_SWAP);
+ struct mem_cgroup *iter;
+
+ for_each_mem_cgroup_tree(iter, memcg) {
+ val += mem_cgroup_read_stat(iter,
+ MEM_CGROUP_STAT_CACHE);
+ val += mem_cgroup_read_stat(iter,
+ MEM_CGROUP_STAT_RSS);
+ if (swap)
+ val += mem_cgroup_read_stat(iter,
+ MEM_CGROUP_STAT_SWAP);
+ }
} else {
if (!swap)
val = page_counter_read(&memcg->memory);
@@ -5075,6 +5084,8 @@ static int memory_events_show(struct seq
static int memory_stat_show(struct seq_file *m, void *v)
{
struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(m));
+ unsigned long stat[MEMCG_NR_STAT];
+ unsigned long events[MEMCG_NR_EVENTS];
int i;
/*
@@ -5088,22 +5099,22 @@ static int memory_stat_show(struct seq_f
* Current memory state:
*/
+ tree_stat(memcg, stat);
+ tree_events(memcg, events);
+
seq_printf(m, "anon %llu\n",
- (u64)tree_stat(memcg, MEM_CGROUP_STAT_RSS) * PAGE_SIZE);
+ (u64)stat[MEM_CGROUP_STAT_RSS] * PAGE_SIZE);
seq_printf(m, "file %llu\n",
- (u64)tree_stat(memcg, MEM_CGROUP_STAT_CACHE) * PAGE_SIZE);
+ (u64)stat[MEM_CGROUP_STAT_CACHE] * PAGE_SIZE);
seq_printf(m, "sock %llu\n",
- (u64)tree_stat(memcg, MEMCG_SOCK) * PAGE_SIZE);
+ (u64)stat[MEMCG_SOCK] * PAGE_SIZE);
seq_printf(m, "file_mapped %llu\n",
- (u64)tree_stat(memcg, MEM_CGROUP_STAT_FILE_MAPPED) *
- PAGE_SIZE);
+ (u64)stat[MEM_CGROUP_STAT_FILE_MAPPED] * PAGE_SIZE);
seq_printf(m, "file_dirty %llu\n",
- (u64)tree_stat(memcg, MEM_CGROUP_STAT_DIRTY) *
- PAGE_SIZE);
+ (u64)stat[MEM_CGROUP_STAT_DIRTY] * PAGE_SIZE);
seq_printf(m, "file_writeback %llu\n",
- (u64)tree_stat(memcg, MEM_CGROUP_STAT_WRITEBACK) *
- PAGE_SIZE);
+ (u64)stat[MEM_CGROUP_STAT_WRITEBACK] * PAGE_SIZE);
for (i = 0; i < NR_LRU_LISTS; i++) {
struct mem_cgroup *mi;
@@ -5118,9 +5129,9 @@ static int memory_stat_show(struct seq_f
/* Accumulated memory events */
seq_printf(m, "pgfault %lu\n",
- tree_events(memcg, MEM_CGROUP_EVENTS_PGFAULT));
+ events[MEM_CGROUP_EVENTS_PGFAULT]);
seq_printf(m, "pgmajfault %lu\n",
- tree_events(memcg, MEM_CGROUP_EVENTS_PGMAJFAULT));
+ events[MEM_CGROUP_EVENTS_PGMAJFAULT]);
return 0;
}
_
Patches currently in -mm which might be from vdavydov@xxxxxxxxxxxxx are
mm-oom_reaper-implement-oom-victims-queuing-fix.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
