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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2009-01-08 03:08:14 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 17:31:07 +0100
commitf89eb90e33fd4e4e0cc1a6d20afd63c5a561885a (patch)
tree2e39e02196dda539c900383ab03f08a311124cd9 /mm/vmscan.c
parentmemcg: hierarchy avoid unnecessary reclaim (diff)
downloadlinux-f89eb90e33fd4e4e0cc1a6d20afd63c5a561885a.tar.xz
linux-f89eb90e33fd4e4e0cc1a6d20afd63c5a561885a.zip
inactive_anon_is_low: move to vmscan
The inactive_anon_is_low() is called only vmscan. Then it can move to vmscan.c This patch doesn't have any functional change. Reviewd-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: 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.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 45983af1de3d..f75d924cb4f4 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1291,6 +1291,26 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
pagevec_release(&pvec);
}
+/**
+ * inactive_anon_is_low - check if anonymous pages need to be deactivated
+ * @zone: zone to check
+ *
+ * Returns true if the zone does not have enough inactive anon pages,
+ * meaning some active anon pages need to be deactivated.
+ */
+static int inactive_anon_is_low(struct zone *zone)
+{
+ unsigned long active, inactive;
+
+ active = zone_page_state(zone, NR_ACTIVE_ANON);
+ inactive = zone_page_state(zone, NR_INACTIVE_ANON);
+
+ if (inactive * zone->inactive_ratio < active)
+ return 1;
+
+ return 0;
+}
+
static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
struct zone *zone, struct scan_control *sc, int priority)
{