From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1LvqBi-0004hw-OE
	for qemu-devel@nongnu.org; Mon, 20 Apr 2009 05:53:18 -0400
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1LvqBd-0004h8-I6
	for qemu-devel@nongnu.org; Mon, 20 Apr 2009 05:53:17 -0400
Received: from [199.232.76.173] (port=35547 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1LvqBd-0004h2-B6
	for qemu-devel@nongnu.org; Mon, 20 Apr 2009 05:53:13 -0400
Received: from mail-ew0-f165.google.com ([209.85.219.165]:39143)
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <al4321@gmail.com>) id 1LvqBc-0005SJ-PK
	for qemu-devel@nongnu.org; Mon, 20 Apr 2009 05:53:12 -0400
Received: by ewy9 with SMTP id 9so838700ewy.34
	for <qemu-devel@nongnu.org>; Mon, 20 Apr 2009 02:53:10 -0700 (PDT)
MIME-Version: 1.0
Date: Mon, 20 Apr 2009 12:53:10 +0300
Message-ID: <7fac565a0904200253k7ec3e83m28401adea775436f@mail.gmail.com>
From: Alexey Eremenko <al4321@gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Subject: [Qemu-devel] Bug: SCSI/VirtIO: VM unable to reboot from non-IDE
	controller
Reply-To: qemu-devel@nongnu.org
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel <qemu-devel@nongnu.org>

Hi All !

Most Linux VMs (Ubuntu and Red Hat-based systems -- RHEL, Fedora) have
failed during automated tests
on SCSI and VirtIO disks on Qemu/KVM.
It turned out to be a problem of Qemu/KVM, where after a software reboot
(i.e. initiated by guest OS), the system is unable to boot from SCSI
controller.

To reboot successfully you need either soft reboot+IDE or Hard reboot (Qemu
cold boot)+SCSI.

The Command sent to Qemu/KVM:
/usr/local/bin/qemu-system-x86_64 -m 512 -monitor
tcp:localhost:4602,server,nowait -cdrom /isos/linux/Fedora-8-i386-DVD.iso
-drive file=/vm/fedora8-32.qcow2,if=scsi,boot=on -name fedora8-32

Host: RHEL 5/x64, KVM-85rc6. (tried both Intel and AMD)
Guests: Ubuntu-8.10, RHEL 5, Fedora 8, Fedora 9 (tried both 32 and 64-bit).

Due to lack of Qemu bugzilla -- bugs were opened on Ubuntu Launchpad
and KVM bugzilla.
https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/363743
https://sourceforge.net/tracker/?func=detail&aid=2768533&group_id=180599&atid=893831

-- 
-Alexey Eromenko "Technologov", 20.4.2009.