summaryrefslogtreecommitdiffstats
path: root/mm/filemap.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/filemap.c')
-rw-r--r--mm/filemap.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 01690338e3d2..beba6bd6b511 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -713,8 +713,12 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
* The page might have been evicted from cache only
* recently, in which case it should be activated like
* any other repeatedly accessed page.
+ * The exception is pages getting rewritten; evicting other
+ * data from the working set, only to cache data that will
+ * get overwritten with something else, is a waste of memory.
*/
- if (shadow && workingset_refault(shadow)) {
+ if (!(gfp_mask & __GFP_WRITE) &&
+ shadow && workingset_refault(shadow)) {
SetPageActive(page);
workingset_activation(page);
} else