From: Yan, Zheng <zheng.z.yan@intel.com>
Date: Fri, 1 Mar 2013 02:55:39 +0000 (+0800)
Subject: ceph: don't early drop Fw cap
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~26^2~241
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6070e0c1e2b515ad5edc2f8224031b051bd08109;p=pandora-kernel.git

ceph: don't early drop Fw cap

ceph_aio_write() has an optimization that marks CEPH_CAP_FILE_WR
cap dirty before data is copied to page cache and inode size is
updated. The optimization avoids slow cap revocation caused by
balance_dirty_pages(), but introduces inode size update race. If
ceph_check_caps() flushes the dirty cap before the inode size is
updated, MDS can miss the new inode size. So just remove the
optimization.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Greg Farnum <greg@inktank.com>
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