From 4b02108ac1b3354a22b0d83c684797692efdc395 Mon Sep 17 00:00:00 2001 From: KOSAKI Motohiro Date: Mon, 21 Sep 2009 17:01:33 -0700 Subject: mm: oom analysis: add shmem vmstat Recently we encountered OOM problems due to memory use of the GEM cache. Generally a large amuont of Shmem/Tmpfs pages tend to create a memory shortage problem. We often use the following calculation to determine the amount of shmem pages: shmem = NR_ACTIVE_ANON + NR_INACTIVE_ANON - NR_ANON_PAGES however the expression does not consider isolated and mlocked pages. This patch adds explicit accounting for pages used by shmem and tmpfs. Signed-off-by: KOSAKI Motohiro Acked-by: Rik van Riel Reviewed-by: Christoph Lameter Acked-by: Wu Fengguang Cc: David Rientjes Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mmzone.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/mmzone.h') diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index d9335b8de84a..b3583b93b77e 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -100,6 +100,7 @@ enum zone_stat_item { NR_BOUNCE, NR_VMSCAN_WRITE, NR_WRITEBACK_TEMP, /* Writeback using temporary buffers */ + NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */ #ifdef CONFIG_NUMA NUMA_HIT, /* allocated in intended node */ NUMA_MISS, /* allocated in non intended node */ -- cgit v1.2.3-59-g8ed1b