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memcg: add zone_reclaim_stat

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Introduce mem_cgroup_per_zone::reclaim_stat member and its statics
collecting function.

Now, get_scan_ratio() can calculate correct value on memcg reclaim.

[hugh@veritas.com: avoid reclaim_stat oops when disabled]
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KOSAKI Motohiro
2009-01-07 18:08:20 -08:00
committed by Linus Torvalds
parent a3d8e0549d
commit 3e2f41f1f6
4 changed files with 83 additions and 23 deletions
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27
mm/vmscan.c
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@@ -133,6 +133,9 @@ static DECLARE_RWSEM(shrinker_rwsem);
static struct zone_reclaim_stat *get_reclaim_stat(struct zone *zone,
struct scan_control *sc)
{
if (!scan_global_lru(sc))
return mem_cgroup_get_reclaim_stat(sc->mem_cgroup, zone);
return &zone->reclaim_stat;
}
@@ -1087,17 +1090,14 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
__mod_zone_page_state(zone, NR_INACTIVE_ANON,
-count[LRU_INACTIVE_ANON]);
if (scan_global_lru(sc)) {
if (scan_global_lru(sc))
zone->pages_scanned += nr_scan;
reclaim_stat->recent_scanned[0] +=
count[LRU_INACTIVE_ANON];
reclaim_stat->recent_scanned[0] +=
count[LRU_ACTIVE_ANON];
reclaim_stat->recent_scanned[1] +=
count[LRU_INACTIVE_FILE];
reclaim_stat->recent_scanned[1] +=
count[LRU_ACTIVE_FILE];
}
reclaim_stat->recent_scanned[0] += count[LRU_INACTIVE_ANON];
reclaim_stat->recent_scanned[0] += count[LRU_ACTIVE_ANON];
reclaim_stat->recent_scanned[1] += count[LRU_INACTIVE_FILE];
reclaim_stat->recent_scanned[1] += count[LRU_ACTIVE_FILE];
spin_unlock_irq(&zone->lru_lock);
nr_scanned += nr_scan;
@@ -1155,7 +1155,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
SetPageLRU(page);
lru = page_lru(page);
add_page_to_lru_list(zone, page, lru);
if (PageActive(page) && scan_global_lru(sc)) {
if (PageActive(page)) {
int file = !!page_is_file_cache(page);
reclaim_stat->recent_rotated[file]++;
}
@@ -1230,8 +1230,8 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
*/
if (scan_global_lru(sc)) {
zone->pages_scanned += pgscanned;
reclaim_stat->recent_scanned[!!file] += pgmoved;
}
reclaim_stat->recent_scanned[!!file] += pgmoved;
if (file)
__mod_zone_page_state(zone, NR_ACTIVE_FILE, -pgmoved);
@@ -1272,8 +1272,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
* This helps balance scan pressure between file and anonymous
* pages in get_scan_ratio.
*/
if (scan_global_lru(sc))
reclaim_stat->recent_rotated[!!file] += pgmoved;
reclaim_stat->recent_rotated[!!file] += pgmoved;
while (!list_empty(&l_inactive)) {
page = lru_to_page(&l_inactive);