read-ahead: use plugging

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/mm/readahead.c b/mm/readahead.c
index cbddc3e17246..2c0cc489e288 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -109,9 +109,12 @@ EXPORT_SYMBOL(read_cache_pages);
 static int read_pages(struct address_space *mapping, struct file *filp,
                 struct list_head *pages, unsigned nr_pages)
 {
+        struct blk_plug plug;
         unsigned page_idx;
         int ret;
 
+        blk_start_plug(&plug);
+
         if (mapping->a_ops->readpages) {
                 ret = mapping->a_ops->readpages(filp, mapping, pages, nr_pages);
                 /* Clean up the remaining pages */
@@ -129,7 +132,10 @@ static int read_pages(struct address_space *mapping, struct file *filp,
                 page_cache_release(page);
         }
         ret = 0;
+
 out:
+        blk_finish_plug(&plug);
+
         return ret;
 }