From: Dave Chinner <david@fromorbit.com>
Date: Mon, 6 Apr 2009 16:44:54 +0000 (+0200)
Subject: xfs: use xfs_sync_inodes() for device flushing
X-Git-Tag: v2.6.30-rc2~68^2^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a8d770d987ee20b59fba6c37d7f0f2a351913c4b;p=pandora-kernel.git

xfs: use xfs_sync_inodes() for device flushing

Currently xfs_device_flush calls sync_blockdev() which is
a no-op for XFS as all it's metadata is held in a different
address to the one sync_blockdev() works on.

Call xfs_sync_inodes() instead to flush all the delayed
allocation blocks out. To do this as efficiently as possible,
do it via two passes - one to do an async flush of all the
dirty blocks and a second to wait for all the IO to complete.
This requires some modification to the xfs-sync_inodes_ag()
flush code to do efficiently.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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