linux-kernel - [PATCH 08/10] read-ahead: use plugging

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Date:	Sat, 22 Jan 2011 01:17:27 +0000
From:	Jens Axboe <jaxboe@...ionio.com>
To:	jaxboe@...ionio.com, linux-kernel@...r.kernel.org
Cc:	hch@...radead.org
Subject: [PATCH 08/10] read-ahead: use plugging

Signed-off-by: Jens Axboe <jaxboe@...ionio.com>
---
 mm/readahead.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index cbddc3e..2c0cc48 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;
 }
 
-- 
1.7.3.2.146.gca209

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