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mm: per-cgroup memory reclaim stats

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Track the following reclaim counters for every memory cgroup: PGREFILL,
PGSCAN, PGSTEAL, PGACTIVATE, PGDEACTIVATE, PGLAZYFREE and PGLAZYFREED.

These values are exposed using the memory.stats interface of cgroup v2.

The meaning of each value is the same as for global counters, available
using /proc/vmstat.

Also, for consistency, rename mem_cgroup_count_vm_event() to
count_memcg_event_mm().

Link: http://lkml.kernel.org/r/1494530183-30808-1-git-send-email-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Suggested-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Gushchin 2017-07-06 15:40:25 -07:00 • committed by Linus Torvalds
parent 94f4a1618b
commit 2262185c5b
10 changed files with 113 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

30
mm/vmscan.c
View file

@ -1294,6 +1294,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
}
count_vm_event(PGLAZYFREED);
count_memcg_page_event(page, PGLAZYFREED);
} else if (!mapping || !__remove_mapping(mapping, page, true))
goto keep_locked;
/*
@ -1323,6 +1324,7 @@ activate_locked:
if (!PageMlocked(page)) {
SetPageActive(page);
pgactivate++;
count_memcg_page_event(page, PGACTIVATE);
}
keep_locked:
unlock_page(page);
@ -1762,11 +1764,16 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
__mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, nr_taken);
reclaim_stat->recent_scanned[file] += nr_taken;
if (global_reclaim(sc)) {
if (current_is_kswapd())
if (current_is_kswapd()) {
if (global_reclaim(sc))
__count_vm_events(PGSCAN_KSWAPD, nr_scanned);
else
count_memcg_events(lruvec_memcg(lruvec), PGSCAN_KSWAPD,
nr_scanned);
} else {
if (global_reclaim(sc))
__count_vm_events(PGSCAN_DIRECT, nr_scanned);
count_memcg_events(lruvec_memcg(lruvec), PGSCAN_DIRECT,
nr_scanned);
}
spin_unlock_irq(&pgdat->lru_lock);
@ -1778,11 +1785,16 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
spin_lock_irq(&pgdat->lru_lock);
if (global_reclaim(sc)) {
if (current_is_kswapd())
if (current_is_kswapd()) {
if (global_reclaim(sc))
__count_vm_events(PGSTEAL_KSWAPD, nr_reclaimed);
else
count_memcg_events(lruvec_memcg(lruvec), PGSTEAL_KSWAPD,
nr_reclaimed);
} else {
if (global_reclaim(sc))
__count_vm_events(PGSTEAL_DIRECT, nr_reclaimed);
count_memcg_events(lruvec_memcg(lruvec), PGSTEAL_DIRECT,
nr_reclaimed);
}
putback_inactive_pages(lruvec, &page_list);
@ -1927,8 +1939,11 @@ static unsigned move_active_pages_to_lru(struct lruvec *lruvec,
}
}
if (!is_active_lru(lru))
if (!is_active_lru(lru)) {
__count_vm_events(PGDEACTIVATE, nr_moved);
count_memcg_events(lruvec_memcg(lruvec), PGDEACTIVATE,
nr_moved);
}
return nr_moved;
}
@ -1966,6 +1981,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
reclaim_stat->recent_scanned[file] += nr_taken;
__count_vm_events(PGREFILL, nr_scanned);
count_memcg_events(lruvec_memcg(lruvec), PGREFILL, nr_scanned);
spin_unlock_irq(&pgdat->lru_lock);