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-rw-r--r--mm/filemap.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 0fcd792103f3..7fadf1c62838 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -753,8 +753,17 @@ EXPORT_SYMBOL(unlock_page);
*/
void end_page_writeback(struct page *page)
{
- if (TestClearPageReclaim(page))
+ /*
+ * TestClearPageReclaim could be used here but it is an atomic
+ * operation and overkill in this particular case. Failing to
+ * shuffle a page marked for immediate reclaim is too mild to
+ * justify taking an atomic operation penalty at the end of
+ * ever page writeback.
+ */
+ if (PageReclaim(page)) {
+ ClearPageReclaim(page);
rotate_reclaimable_page(page);
+ }
if (!test_clear_page_writeback(page))
BUG();