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[Qemu-devel] Re: Re: Problem with virtio


From: Michael S. Tsirkin
Subject: [Qemu-devel] Re: Re: Problem with virtio
Date: Sun, 26 Sep 2010 17:30:19 +0200
User-agent: Mutt/1.5.20 (2009-12-10)

On Tue, Sep 21, 2010 at 01:15:22AM +0200, Frans de Boer wrote:
> On 09/20/2010 11:19 PM, Vadim Rozenfeld wrote:
> > On Mon, 2010-09-20 at 22:22 +0200, Frans de Boer wrote:
> >   
> >> On 09/20/2010 07:46 PM, Michael S. Tsirkin wrote:
> >>     
> >>> On Sun, Sep 19, 2010 at 11:13:16PM +0200, Frans de Boer wrote:
> >>>   
> >>>       
> >>>> On 09/19/2010 05:53 PM, Michael S. Tsirkin wrote:
> >>>>
> >>>>     On Sat, Sep 18, 2010 at 11:13:12PM +0200, Frans de Boer wrote:
> >>>>
> >>>>
> >>>>         On 09/17/2010 10:10 AM, Frans de Boer wrote:
> >>>>
> >>>>
> >>>>             On 09/17/2010 01:40 AM, Luiz Capitulino wrote:
> >>>>
> >>>>
> >>>>
> >>>>                 On Thu, 16 Sep 2010 23:49:51 +0200
> >>>>                 Frans de Boer <address@hidden> wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>                     Dear reader,
> >>>>
> >>>>                     Using qemu-kvm-0.13-rc1 and having the boot 
> >>>> partition as if=virtio,
> >>>>                     causes the attached blue screen when booting Windows 
> >>>> XP SP3.
> >>>>                     Changing the interface to ide (if=ide) and the 
> >>>> system boots normal.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>                 Do you have the virtio drivers installed?
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>             Yes, everything is working fine when I use the 0.12.5 
> >>>> release.
> >>>>             Before you ask, I am using the git repository too. Same 
> >>>> effect.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>         No suggestions form anyone?
> >>>>         Again, any compile combination is working under 0.12.5. Starting 
> >>>> with
> >>>>         0.13-rc0/1 the virtio option for the boot disk is not working 
> >>>> anymore.
> >>>>
> >>>>         Frans.
> >>>>
> >>>>
> >>>>     Could you try bisecting please?
> >>>>     git bisect start v0.13.0-rc0 v0.12.0
> >>>>
> >>>>     will start the bisect process, then you build, test and run
> >>>>     git bisect good/git bisect bad as appropriate to get the
> >>>>     new version.
> >>>>
> >>>>
> >>>>
> >>>> Following your advice, I noticed that the system could not boot when I 
> >>>> use the
> >>>> guest virtio driver. I then switch back to as far as  version 10.0 with 
> >>>> the
> >>>> same bad result. I then remembered that in the past I used the '.raw' 
> >>>> format.
> >>>> Since I am using the qcow2 format (better performance), I never tried 
> >>>> if=virtio
> >>>> for the disk before until I use the 0.13.0-rc1 version. I tried the 
> >>>> release tar
> >>>> file of 0.12.5 and this time with the guest virtio driver, with the same 
> >>>> bad
> >>>> result.
> >>>> Maybe it is the file format? Maybe the virtio disk driver? I have taken 
> >>>> the
> >>>> virtio drivers from the KVM website.
> >>>>
> >>>>         
> > Please try this one 
> > http://people.redhat.com/vrozenfe/VioStorXp32.tar.gz
> > Cheers,
> > Vadim.
> >   
> >>>> Frans.
> >>>>     
> >>>>         
> >>> I got confused, sorry. Let's try to enumerate what works and what does 
> >>> not.
> >>> Could you tell us which of the following combinations you tried
> >>> and with what result (works/doesn't)?
> >>>
> >>> - virtio + raw + 0.12
> >>> - virtio + qcow2 + 0.12
> >>> - ide + qcow2 + 0.12
> >>>
> >>> - virtio + raw + 0.13
> >>> - virtio + qcow2 + 0.13
> >>> - ide + qcow2 + 0.13
> >>>
> >>> Thanks!
> >>>
> >>>   
> >>>       
> >> I used 0.12.5 (git and tarball) and the 0.13-rc1 (git and tarball)
> >>
> >> - virtio + raw + 0.12              ok
> >> - virtio + qcow2 + 0.12            fail!
> >> - ide + qcow2 + 0.12               ok
> >>
> >> - virtio + raw + 0.13              fail!
> >> - virtio + qcow2 + 0.13            fail!
> >> - ide + qcow2 + 0.13               ok
> >>
> >> Frans.
> >>     
> The new list is:
> 
> - virtio + raw + 0.13         ok.
> 
> That is when I am using this viostor driver:
>   http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/bin/
> I used the complete ISO file and extracted the viostor files. These are 6.x 
> files.
> 
> .qcow2 with virtio still does not work under 0.13-rc1
> It's late, so maybe in a few days I try 0.12.5 with the .qcow2 format.

OK, so with new drivers all formats behave identically
under 0.13 and 0.12, right?


> By the way, above ISO file contains much more virtio goodies not supplied yet 
> at the KVM or QEMU site. Maybe an upgrade at the site is in order?
> 
> Frans.
> 
> 



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