From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Wong <johnw@wonghome.net>
Subject: xorg running very slow problem
Date: Sun, 10 Jan 2010 13:54:27 +0800
Message-ID: <4B496B93.1020706@wonghome.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=Big5
Content-Transfer-Encoding: 7bit
To: kvm@vger.kernel.org
Return-path: <kvm-owner@vger.kernel.org>
Received: from maiden103.ctimail.com ([61.93.57.254]:52219 "EHLO
	maiden103.ctimail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1750874Ab0AJFyx (ORCPT <rfc822;kvm@vger.kernel.org>);
	Sun, 10 Jan 2010 00:54:53 -0500
Received: from smtp1o.ctimail.com (smtp1o [203.186.94.57])
	by maiden103.ctimail.com (8.12.11/8.12.11) with ESMTP id o0A5smqg029178
	for <kvm@vger.kernel.org>; Sun, 10 Jan 2010 13:54:48 +0800
Received: from pdc.wonghome.net (124244200136.ctinets.com [124.244.200.136])
	by smtp1o.ctimail.com (8.12.11/8.12.11) with ESMTP id o0A5sl3k018243
	for <kvm@vger.kernel.org>; Sun, 10 Jan 2010 13:54:48 +0800 (HKT)
Received: from pdc.wonghome.net (localhost [127.0.0.1])
	by pdc.wonghome.net (Postfix) with ESMTP id 1B8A541724
	for <kvm@vger.kernel.org>; Sun, 10 Jan 2010 13:54:32 +0800 (HKT)
Received: from [192.168.168.3] (redcat.wonghome.net [192.168.168.3])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by pdc.wonghome.net (Postfix) with ESMTPSA id 8400C41734
	for <kvm@vger.kernel.org>; Sun, 10 Jan 2010 13:54:31 +0800 (HKT)
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

When i use qemu-kvm-87 or qemu-kvm-0.12.1.2 or snapshot (download from
http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=summary),
xorg will running very slow (the screen refresh line by line), and i
noticed the program "Xorg" will running very high cpu(>99% in top).

If i use qemu-kvm-86, xorg does not have this problem, and run just fine.

The modules is come from debian-2.6.32 kvm-intel.

The host is debian/x64/2.6.32.

I use this command to start kvm:

${KVM} -drive
file=${IMG},index=0,if=virtio,boot=on,cache=none,format=qcow2 \
-net nic,vlan=${NUM},model=virtio,macaddr=00:AA:BB:CC:DD:0${NUM} \
-net
tap,vlan=${NUM},ifname="${iface}",script=/etc/kvm/kvm-ifup,downscript=/etc/kvm/kvm-ifdown
\
-localtime -smp 2 \
-soundhw all \
-usb -usbdevice tablet \
-k en-us -monitor stdio \
-mem-path /hugepages \
-vga std -sdl \
-m 2048 -boot c

Anyone know how to solve this problem?

Please help, thank you.