linux-kernel - [PATCH] mm: fix accounting on page_remove

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Message-Id: <1378122191-15479-1-git-send-email-kirill.shutemov@linux.intel.com>
Date:	Mon,  2 Sep 2013 14:43:11 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ning Qu <quning@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH] mm: fix accounting on page_remove_rmap()

There's typo in page_remove_rmap(): we increase NR_ANON_PAGES counter
instead of decreasing it. Let's fix this.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Reported-by: Ning Qu <quning@...gle.com>
---
 mm/rmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/rmap.c b/mm/rmap.c
index 52cc59a..6219f07 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1156,7 +1156,7 @@ void page_remove_rmap(struct page *page)
 			__dec_zone_page_state(page,
 					      NR_ANON_TRANSPARENT_HUGEPAGES);
 		__mod_zone_page_state(page_zone(page), NR_ANON_PAGES,
-				hpage_nr_pages(page));
+				-hpage_nr_pages(page));
 	} else {
 		__dec_zone_page_state(page, NR_FILE_MAPPED);
 		mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
-- 
1.8.4.rc3

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