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>
diff --git a/drivers/xen/blkback/xenbus.c b/drivers/xen/blkback/xenbus.c
index c31e5c4..a0534fc 100644
--- a/drivers/xen/blkback/xenbus.c
+++ b/drivers/xen/blkback/xenbus.c
@@ -91,6 +91,13 @@
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);