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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2008-02-07 00:14:32 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:21 -0800
commit58ae83db2a40dea15d4277d499a11dadc823c388 (patch)
tree18e43609ab67a9577c01188d39714999d5ed03d0 /mm/memcontrol.c
parent6d12e2d8ddbe653d80ea4f71578481c1bc933025 (diff)
per-zone and reclaim enhancements for memory controller: calculate mapper_ratio per cgroup
Define function for calculating mapped_ratio in memory cgroup. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: David Rientjes <rientjes@google.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Kirill Korotaev <dev@sw.ru> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Paul Menage <menage@google.com> Cc: Pavel Emelianov <xemul@openvz.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 1637575d3339..2ef214ed5cf8 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -420,6 +420,23 @@ void mem_cgroup_move_lists(struct page_cgroup *pc, bool active)
spin_unlock(&mem->lru_lock);
}
+/*
+ * Calculate mapped_ratio under memory controller. This will be used in
+ * vmscan.c for deteremining we have to reclaim mapped pages.
+ */
+int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
+{
+ long total, rss;
+
+ /*
+ * usage is recorded in bytes. But, here, we assume the number of
+ * physical pages can be represented by "long" on any arch.
+ */
+ total = (long) (mem->res.usage >> PAGE_SHIFT) + 1L;
+ rss = (long)mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS);
+ return (int)((rss * 100L) / total);
+}
+
unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,