WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] [PATCH] Allow blktap to be able to be booted assystemvol

To: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Allow blktap to be able to be booted assystemvolume for PV-on-HVM
From: "Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx>
Date: Tue, 10 Jul 2007 09:55:25 +0900
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Mon, 09 Jul 2007 17:56:32 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <4e4701c7bfbb$c7a8b360$dab2220a@VF03007L><20070706132758.GD4286@xxxxxxxxxx><02c701c7c1e7$cc6b2ad0$dab2220a@VF03007L> <20070709134759.GA9496@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Hi Daniel,

Thank you for the reply.

We think about the specification of the device as follows.
The hda is initialized of emulator first.
It works by the emulator if there is no PV driver in the HVM domain. It is initialized as VBD if there is PV driver in the HVM domain. And, the hda changes to VBD and works as VBD.
On the other hand, the xvda doesn't initialize it as an emulator.
It doesn't work if there is no PV driver in the HVM domain. It works as VBD if there is PV driver in the HVM domain. The hda is used as a device from which the emulator is switched to VBD. And, the xvd* is used as a device only for VBD. Therefore, the system disk is specified for hda as well as a usual HVM domain. Other data disks are specified for xvd*. We boot the HVM domain specifying both hda and xvda.
What scenario are you assuming?
Do you initialize all 'xvd*' as an emulator?

Best Regards,

--
Takanori Kasai


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel