From mboxrd@z Thu Jan  1 00:00:00 1970
From: George Dunlap <george.dunlap@eu.citrix.com>
Subject: [PATCH] xencommons: Attempt to load blktap driver
Date: Tue, 15 May 2012 16:49:37 +0100
Message-ID: <db614e92faf743e20b3f.1337096977@kodo2>
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Older kernels, such as those found in Debian Squeeze:
* Have bugs in handling of AIO into foreign pages
* Have blktap modules, which will cause qemu not to use AIO, but
which are not loaded on boot.

Attempt to load blktap in xencommons, to make sure modern qemu's which
use AIO will work properly on those kernels.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>

diff -r 99244350516a -r db614e92faf7 tools/hotplug/Linux/init.d/xencommons
--- a/tools/hotplug/Linux/init.d/xencommons	Tue May 15 16:48:49 2012 +0100
+++ b/tools/hotplug/Linux/init.d/xencommons	Tue May 15 16:49:32 2012 +0100
@@ -59,6 +59,7 @@ do_start () {
 	modprobe evtchn 2>/dev/null
 	modprobe gntdev 2>/dev/null
 	modprobe xen-acpi-processor 2>/dev/null
+	modprobe blktap 2>/dev/null
 	mkdir -p /var/run/xen
 
 	if ! `xenstore-read -s / >/dev/null 2>&1`