---

yaml --- r: 218530 b: refs/heads/master c: 0c270f8 h: refs/heads/master v: v3
git-mirror · Oct 28, 2010 · c0950f5 · c0950f5
1 parent e3e7cf6
commit c0950f5
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 45531757b45cae0ce64c5aff08c2534d5a0fa3e7
+refs/heads/master: 0c270f8f9988fb0d93ea214fdcff7ab90eb3d894
diff --git a/trunk/mm/memcontrol.c b/trunk/mm/memcontrol.c
@@ -1485,7 +1485,8 @@ void mem_cgroup_update_file_mapped(struct page *page, int val)
 		SetPageCgroupFileMapped(pc);
 	} else {
 		__this_cpu_dec(mem->stat->count[MEM_CGROUP_STAT_FILE_MAPPED]);
-		ClearPageCgroupFileMapped(pc);
+		if (!page_mapped(page)) /* for race between dec->inc counter */
+			ClearPageCgroupFileMapped(pc);
 	}
 
 done: