From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Fri, 27 Jun 2014 16:00:41 +0000 (+0900)
Subject: f2fs: check bdi->dirty_exceeded when trying to skip data writes
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~325^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2743f865543c0c4a5e12fc13edb2bf89a6e9687c;p=pandora-kernel.git

f2fs: check bdi->dirty_exceeded when trying to skip data writes

If we don't check the current backing device status, balance_dirty_pages can
fall into infinite pausing routine.

This can be occurred when a lot of directories make a small number of dirty
dentry pages including files.

Reported-by: Brian Chadwick <brianchad@westnet.com.au>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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