From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Sat, 29 Sep 2012 04:56:15 +0000 (-0400)
Subject: ext4: endless truncate due to nonlocked dio readers
X-Git-Tag: v3.7-rc1~91^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b65007e9870e0021397b548e8cd6bbc584f9152;p=pandora-kernel.git

ext4: endless truncate due to nonlocked dio readers

If we have enough aggressive DIO readers, truncate and other dio
waiters will wait forever inside inode_dio_wait(). It is reasonable
to disable nonlock DIO read optimization during truncate.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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