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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2009-01-07 18:08:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 08:31:08 -0800
commit3e2f41f1f64744f7942980d93cc93dd3e5924560 (patch)
tree7b605c407b7470877fd9c5c853407f75edcbeb49 /mm/vmscan.c
parenta3d8e0549d913e30968fa02e505dfe02c0a23e0d (diff)
downloadop-kernel-dev-3e2f41f1f64744f7942980d93cc93dd3e5924560.zip
op-kernel-dev-3e2f41f1f64744f7942980d93cc93dd3e5924560.tar.gz
memcg: add zone_reclaim_stat
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>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c27
1 files changed, 13 insertions, 14 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d958d62..56fc7ab 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -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);
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