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[Xen-users] GPL PV TAP cow incompatible?

from [Martin Kjær Jørgensen]

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

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

The Windows DomU works fine with raw standard "file:/" images, andparavirtualized 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 withnormal 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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