Re: [Xen-users] qdisk and debian

[Fabio Fantoni <fantonifabio@xxxxxxxxxx>]

Il 20/12/2013 11:25, James Harper ha scritto:
> > I started to use qdisk with xen from qemu 1.3 and I already used it also with
> > qemu 1.7 without found problem.
> > I had also tested qemu debian package with xen compiled from source since
> > qemu 1.4, I not tested the latest from debian package but should be working,
> > qemu debian package have also some features missed on upstream qemu
> > compiled
> > from xen (for example spice and usbredirection).
> > Probably your problem can be related to bad hvm domUs support on xen
> > debian
> > package:
> > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=731038
> >
> > If your problem is another please post details and I'll try to help you.
> Thanks I think I figured it out. I had to add backendtype=qdisk onto the end. The instructions at 
> http://xenbits.xen.org/docs/4.3-testing/misc/xl-disk-configuration.txt didn't work for the pure 
> "<key>=<value>" type specification, at least under debian. I had to tack 
> 'backendtype=qdisk' to the end of a fixed position parameter style configuration.
>
> With qdisk enabled under a current Jessie install, qemu-system-i386 was sitting 
> on a steady 12.3% cpu though, even though the domu should have been idle. As 
> soon as I ran an strace against the process it dropped to idle%, so I don't 
> know what was going on... maybe the domu really was just busy.
>
> Rebuilding debian qemu package with rbd support now... hopefully that works 
> without any fuss!
If your problem is only about rbd support there is a bug open on debian 
about it:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=689239
I not tested it for now but with fast watch on bugtracker seems there 
was a regression with build and the qemu maintainer removed the rbd 
support, if with your tested you saw that regression is solved can be 
useful reply about this.
> Thanks again!
>
> James
>
>
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