From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: frame buffer shared by domains on arch arm linux
Date: Fri, 23 Jan 2015 09:24:51 +0000
Message-ID: <1422005091.19859.3.camel@citrix.com>
References: <54BF64F1.1090300@gmail.com>
	<alpine.DEB.2.02.1501211047070.12653@kaball.uk.xensource.com>
	<54C05E05.1020200@gmail.com>
	<alpine.DEB.2.02.1501221126350.3353@kaball.uk.xensource.com>
	<54C210E3.50100@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <54C210E3.50100@gmail.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Mao Mingy <maomingya928@gmail.com>
Cc: xen-devel@lists.xen.org, Stefano Stabellini <stefano.stabellini@eu.citrix.com>
List-Id: xen-devel@lists.xenproject.org

On Fri, 2015-01-23 at 17:14 +0800, Mao Mingy wrote:
> 1. QEMU's start up parameter, changed the original from Xen4.5 
> /usr/local/lib/xen/bin/qemu-system-i386 -xen-domid 0

Are you trying to use pvfb for dom0's own graphical output?

This qemu process you quote here is running against dom0 in order to
provide backend services for frontends running in dom0 itself, i.e.
things like loopback qdisk mounts to the toolstack.

For a domU the xl toolstack should be launching a new qemu process
specifically for that domain, e.g. with -xen-domid <domid> (for 
domid!=0).

Ian.