---

yaml --- r: 115863 b: refs/heads/master c: a978d6f h: refs/heads/master i: 115861: 5f1fd5d 115859: fecc202 115855: caddaf0 v: v3
git-mirror · Oct 20, 2008 · 54c5a8d · 54c5a8d
1 parent 61375f8
commit 54c5a8d
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Showing 2 changed files with 9 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f45840b5c128445da70e7ec33adc47b4a12bdaf4
+refs/heads/master: a978d6f521063514812a7094dbe5036e056e4de3
diff --git a/trunk/mm/vmscan.c b/trunk/mm/vmscan.c
@@ -732,7 +732,14 @@ static unsigned long shrink_page_list(struct list_head *page_list,
 		if (!mapping || !__remove_mapping(mapping, page))
 			goto keep_locked;
 
-		unlock_page(page);
+		/*
+		 * At this point, we have no other references and there is
+		 * no way to pick any more up (removed from LRU, removed
+		 * from pagecache). Can use non-atomic bitops now (and
+		 * we obviously don't have to worry about waking up a process
+		 * waiting on the page lock, because there are no references.
+		 */
+		__clear_page_locked(page);
 free_it:
 		nr_reclaimed++;
 		if (!pagevec_add(&freed_pvec, page)) {