From: Christoph Hellwig <hch@infradead.org>
Date: Tue, 27 Mar 2012 14:34:48 +0000 (-0400)
Subject: xfs: reduce ilock hold times in xfs_setattr_size
X-Git-Tag: v3.5-rc1~91^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f38996f5768713fb60e1d2de66c097367d54bb6a;p=pandora-kernel.git

xfs: reduce ilock hold times in xfs_setattr_size

We do not need the ilock for most checks done in the beginning of
xfs_setattr_size.  Replace the long critical section before starting the
transaction with a smaller one around xfs_zero_eof and an optional one
inside xfs_qm_dqattach that isn't entered unless using quotas.  While
this isn't a big optimization for xfs_setattr_size itself it will allow
pushing the ilock into xfs_zero_eof itself later.

Signed-off-by: Christoph Hellwig <hch@lst.de>
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