Re: [Xen-users] GPL PV TAP cow incompatible?

["Nick Couchman" <Nick.Couchman@xxxxxxxxx>]

What version of Xen are you running?  I've never been able to get tap:{aio,cow} to work with the GPL PV drivers under Xen 3.2.x.  However, James Harper has reported that they work find under Xen 3.3.x.

-Nick


-----Original Message-----
From: Martin Kjær Jørgensen <shaoh@xxxxxxx>
To: xen-users@xxxxxxxxxxxxxxxxxxx
Cc: james.harper@xxxxxxxxxxxxxxxx
Subject: [Xen-users] GPL PV TAP cow incompatible?
Date: Thu, 26 Feb 2009 16:32:48 +0100

Hi

Is it true that the GPLPV drivers is incompatible with QCOW images?

The Windows DomU works fine with raw standard "file:/" images, and  
paravirtualized Linux DomU works fine with QCOW and raw images.

If i use QCOW images with my Windows DomU's i get a stop error:  
0x00000007b (inaccessible boot device).
It looks like the blkback.3.hda process, that normally starts with  
normal raw backend, doesnt get started with tap:qcow disks.
Instead i get this repeating entry in the qemu log:
    XenPCI     Still waiting for 2 (currently 1)...
    XenPCI     Still waiting for 2 (currently 1)...
    XenPCI     Still waiting for 2 (currently 1)...

Any ideas?

/Martin

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