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xen/blkback: Flush blkback data when connecting. 

First cut at flushing blkback data when first connecting
blkback.  This should avoid the pygrub issues we are experiencing
in (RedHat bugzilla) 466681.

[ 2.6.18-xen.hg commit 63b4d7f56688 ]

Signed-off-by: Chris Lalancette <clalance@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Chris Lalancette 2010-07-21 12:41:45 -07:00 committed by Konrad Rzeszutek Wilk
parent 98e036a356
commit cbf462908c
1 changed files with 7 additions and 0 deletions
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7
drivers/xen/blkback/xenbus.c
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@ -91,6 +91,13 @@ static void update_blkif_status(blkif_t *blkif)
return;
}
err = filemap_write_and_wait(blkif->vbd.bdev->bd_inode->i_mapping);
if (err) {
xenbus_dev_error(blkif->be->dev, err, "block flush");
return;
}
invalidate_inode_pages2(blkif->vbd.bdev->bd_inode->i_mapping);
blkif->xenblkd = kthread_run(blkif_schedule, blkif, name);
if (IS_ERR(blkif->xenblkd)) {
err = PTR_ERR(blkif->xenblkd);