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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2009-09-21 17:01:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:27 -0700
commit4b02108ac1b3354a22b0d83c684797692efdc395 (patch)
tree9f65d6e8e35ddce940e7b9da6305cf5a19e5904e /drivers/base/node.c
parentc6a7f5728a1db45d30df55a01adc130b4ab0327c (diff)
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 <kosaki.motohiro@jp.fujitsu.com> Acked-by: Rik van Riel <riel@redhat.com> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/base/node.c')
-rw-r--r--drivers/base/node.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c
index b560c17f6d4..1fe5536d404 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -85,6 +85,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
"Node %d FilePages: %8lu kB\n"
"Node %d Mapped: %8lu kB\n"
"Node %d AnonPages: %8lu kB\n"
+ "Node %d Shmem: %8lu kB\n"
"Node %d KernelStack: %8lu kB\n"
"Node %d PageTables: %8lu kB\n"
"Node %d NFS_Unstable: %8lu kB\n"
@@ -117,6 +118,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
nid, K(node_page_state(nid, NR_FILE_PAGES)),
nid, K(node_page_state(nid, NR_FILE_MAPPED)),
nid, K(node_page_state(nid, NR_ANON_PAGES)),
+ nid, K(node_page_state(nid, NR_SHMEM)),
nid, node_page_state(nid, NR_KERNEL_STACK) *
THREAD_SIZE / 1024,
nid, K(node_page_state(nid, NR_PAGETABLE)),