[PATCH] splice: call handle_ra_miss() on failure to lookup page
Notify the readahead logic of the missing page. Suggested by
Oleg Nesterov.
Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/fs/splice.c b/fs/splice.c
index d7538d8..0a69164 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -302,6 +302,12 @@
page = find_get_page(mapping, index);
if (!page) {
/*
+ * Make sure the read-ahead engine is notified
+ * about this failure.
+ */
+ handle_ra_miss(mapping, &in->f_ra, index);
+
+ /*
* page didn't exist, allocate one.
*/
page = page_cache_alloc_cold(mapping);