path: root/fs
diff options
authorMinchan Kim <minchan.kim@gmail.com>2010-01-08 14:43:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-01-11 09:34:07 -0800
commit7f53a09ed40f08416b3029ada8f02252e7596c18 (patch)
tree51d2bef1ca3a4667e5b9058b6f2b365edd101ebd /fs
parentd2b34e20c1f431604e0dde910c3ff271c84ed706 (diff)
smaps: fix wrong rss count
A long time ago we regarded zero page as file_rss and vm_normal_page doesn't return NULL. But now, we reinstated ZERO_PAGE and vm_normal_page's implementation can return NULL in case of zero page. Also we don't count it with file_rss any more. Then, RSS and PSS can't be matched. For consistency, Let's ignore zero page in smaps_pte_range. Signed-off-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Acked-by: Matt Mackall <mpm@selenic.com> Reviewed-by: 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 'fs')
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 47c03f4336b..f277c4a111c 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -361,12 +361,11 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
if (!pte_present(ptent))
- mss->resident += PAGE_SIZE;
page = vm_normal_page(vma, addr, ptent);
if (!page)
+ mss->resident += PAGE_SIZE;
/* Accumulate the size in pages that have been accessed. */
if (pte_young(ptent) || PageReferenced(page))
mss->referenced += PAGE_SIZE;