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/
Home Products Support Community News


Re: [Xen-devel] Xen 4.0.0-rc5 with xen/stable dom0 kernel, blkt

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Xen 4.0.0-rc5 with xen/stable dom0 kernel, blktap2, relative mouse
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Thu, 04 Mar 2010 10:22:20 -0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 04 Mar 2010 10:23:11 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20100304155154.GB2761@xxxxxxxxxxx>
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/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <20100304154421.GA2761@xxxxxxxxxxx> <20100304155154.GB2761@xxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100301 Fedora/3.0.3-1.fc12 Lightning/1.0b2pre Thunderbird/3.0.3
On 03/04/2010 07:51 AM, Pasi Kärkkäinen wrote:
On Thu, Mar 04, 2010 at 05:44:21PM +0200, Pasi Kärkkäinen wrote:

I just tried running Xen 4.0.0-rc5 (64bit) with latest xen/stable dom0 
kernel (64bit aswell).
System boots up fine, and I'm able to run PV guests using phy: disk backend 
(lvm volumes).

I tried using tap:aio: file-based storage with virt-manager for a PV guest.
It seems it doesn't really work, the guest waits for a long time
initializing disk drivers/devices, and then complains about not having any 

$ xm list -l testfoo
             (protocol x86_64-abi)
             (uuid f7723325-9ff4-96f7-0808-9ec05a00a4b8)
             (bootable 1)
             (dev xvda:disk)
             (uname tap:aio:/var/lib/libvirt/images/testfoo.img)
             (mode w)
             (backend 0)
             (VDI )

Am I supposed to have that 'uname' there? This could be a problem with 
virt-manager or libvirt,
so I'll try with plain normal /etc/xen/ cfgfiles next..

Hmm, it seems phy: based guest has that 'uname' aswell:

             (protocol x86_64-abi)
             (uuid b7c115d7-138a-5cd0-a179-3038ba49d349)
             (bootable 1)
             (devid 51712)
             (driver paravirtualised)
             (dev xvda:disk)
             (uname phy:/dev/vg_f12test/f12test)
             (mode w)
             (backend 0)

So I guess that's all fine.

What's the best way to troubleshoot the blktap2 problem?

I have 'blktap' module loaded in dom0, and xen 4.0.0-rc5
should have the required blktap2 tools..

I haven't had any problems with blktap2 at all lately, using the xend/xm toolstack. Are there any messages in the various logfiles and/or kernel which might indicate a problem?


Xen-devel mailing list