qubes-linux-kernel/patches.xen/xen-blkback-disable-barriers.patch

--- linux-2.6.38.3/drivers/xen/blkback/xenbus.c	2011-08-18 00:08:53.000000000 +0200
+++ linux-2.6.38.3/drivers/xen/blkback/xenbus.c.new	2011-08-18 14:37:46.615344310 +0200
@@ -441,7 +441,7 @@
 		return;
 	}
 
-	err = blkback_barrier(xbt, be, 1);
+	err = blkback_barrier(xbt, be, 0);
 	if (err)
 		goto abort;