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From: Shaohua Li <shaohua.li@intel.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Christoph Hellwig <hch@infradead.org>,
	lkml <linux-kernel@vger.kernel.org>
Subject: [patch]mm: add more blk plug
Date: Mon, 26 Sep 2011 10:30:26 +0800	[thread overview]
Message-ID: <1317004226.29510.172.camel@sli10-conroe> (raw)

Some filesystems implement .writepages. We don't have blk plug
in such filesystems for .writepages.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 0e309cd..b9e73a1 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1253,13 +1253,16 @@ EXPORT_SYMBOL(generic_writepages);
 int do_writepages(struct address_space *mapping, struct writeback_control *wbc)
 {
 	int ret;
+	struct blk_plug plug;
 
 	if (wbc->nr_to_write <= 0)
 		return 0;
+	blk_start_plug(&plug);
 	if (mapping->a_ops->writepages)
 		ret = mapping->a_ops->writepages(mapping, wbc);
 	else
 		ret = generic_writepages(mapping, wbc);
+	blk_finish_plug(&plug);
 	return ret;
 }
 



             reply	other threads:[~2011-09-26  2:25 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-26  2:30 Shaohua Li [this message]
2011-09-26  7:30 ` [patch]mm: add more blk plug Christoph Hellwig
2011-09-26  7:38   ` Shaohua Li
2011-09-26  9:45     ` Christoph Hellwig
2011-09-28  3:09       ` [patch]ext4: add block plug for .writepages Shaohua Li
2011-10-09  6:09         ` Shaohua Li
2011-10-10 16:51         ` Ted Ts'o
2011-10-11  0:07           ` NamJae Jeon
2011-10-11  0:07             ` NamJae Jeon
2011-10-11 10:40           ` Kyungmin Park
2011-10-11 10:40             ` Kyungmin Park
2011-10-12  0:53             ` Shaohua Li

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