From: Shaohua Li <shaohua.li@intel.com>
Date: Tue, 18 Oct 2011 14:55:51 +0000 (-0400)
Subject: ext4: add block plug for .writepages
X-Git-Tag: v3.2-rc1~85^2~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1bce63d1a2a2c8929442b79acd4eab2e3db10a0b;p=pandora-kernel.git

ext4: add block plug for .writepages

Add block plug for ext4 .writepages. Though ext4 .writepages
already handles request merge very well, block plug is still
helpful to reduce block lock contention.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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