Re: [libvirt test] 65324: regressions - FAIL

[Ian Campbell <ian.campbell@citrix.com>]

On Fri, 2015-12-04 at 15:14 +0000, Stefano Stabellini wrote:
> On Fri, 4 Dec 2015, Ian Campbell wrote:
> > On Fri, 2015-12-04 at 14:43 +0000, Stefano Stabellini wrote:
> > > On Fri, 4 Dec 2015, Ian Campbell wrote:
> > > > Stefano, Anthony: The debian-di-install failure has "error: Unknown
> > > > driver
> > > > 'vhd'" in the qemu-log. It turns out this has previously been
> > > > bisected
> > > > and
> > > > blamed on:
> > > > 
> > > >   commit 3fb401edbd8e9741c611bfddf6a2032ca91f55ed
> > > >   Merge: a44c280 816609b
> > > >   Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> > > >   Date:   Mon Nov 23 16:55:36 2015 +0000
> > > > 
> > > >       Merge remote-tracking branch 'qemu-xen/staging' into qemu-
> > > > xen-4.7
> > > 
> > > This patch should fix the QEMU vhd issue:
> > > 
> > > http://marc.info/?i=alpine.DEB.2.02.1512041435110.24652%40kaball.uk.x
> > > enso
> > > urce.com
> > 
> > OOI what causes it?
> 
> libxl passes "vhd" when actually "vpc" is the correct string to match
> the right driver in QEMU. Secondly QEMU has become more stringent in how
> format recognition is done and given that the user is passing a driver
> name ("vhd", which is wrong), it is not going to try to guess the right
> driver for the image anymore.
> 
> In other words, it used to work by "accident".

Thanks for the explanation.

Ian.

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