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Re: [Qemu-devel] change x86 default machine type to Q35?
From: |
Eduardo Habkost |
Subject: |
Re: [Qemu-devel] change x86 default machine type to Q35? |
Date: |
Wed, 12 Jul 2017 12:17:52 -0300 |
User-agent: |
Mutt/1.8.0 (2017-02-23) |
On Wed, Jul 12, 2017 at 09:39:39AM +0300, Marcel Apfelbaum wrote:
> On 11/07/2017 17:47, Paolo Bonzini wrote:
> > On 11/07/2017 16:42, Kevin Wolf wrote:
> > > > > Concerning QEMU, could we maybe simply emit a warning a la
> > > > >
> > > > > "you did not specify a machine type with the -M option, so you are
> > > > > currently running the the 'pc' machine type. Please note that
> > > > > future
> > > > > versions of QEMU might use the 'q35' machine type instead. If you
> > > > > require the 'pc' machine type for your setting, then please specify
> > > > > it with the -M option."
> > > > Warnings tend to get ignored until things are actually break, so I
> > > > don't think this helps much. I think simply not having a default
> > > > machine type (as already suggested elsewhere in this thread) is the
> > > > best way to deal with this.
> > > I would absolutely hate this. One of the nice things about qemu has
> > > always been that 'qemu disk.img' is enough to start a simple VM. You
> > > only need to touch any other options for things you care about. I
> > > wouldn't want to give this up.
> >
> > I agree. Don't change anything, leave "-M pc" aside, and let libosinfo
> > pick q35 for newer guests.
> >
>
> Hi Paolo,
>
> While I do think it would be a good step moving forward, I am not
> convinced is "enough" to get more users using it. More so, a low
> level bug in upper layers (e.g. Open stack) will lead to difficulty
> to debug and result in the same "The machine is not steady enough,
> it doesn't worth the effort, let's move back to pc", or even
> frustration of the people that really need Q35.
I guess not being enough depends on which users we want to
affect. People who run QEMU from the command-line don't get a
virtio drive or a modern CPU model chosen by default, either. Is
the choice of machine-type different? Why?
> [...]
--
Eduardo
- Re: [Qemu-devel] change x86 default machine type to Q35?, (continued)
- Re: [Qemu-devel] change x86 default machine type to Q35?, Paolo Bonzini, 2017/07/10
- Re: [Qemu-devel] change x86 default machine type to Q35?, Eduardo Habkost, 2017/07/10
- Re: [Qemu-devel] change x86 default machine type to Q35?, Michael S. Tsirkin, 2017/07/10
- Re: [Qemu-devel] change x86 default machine type to Q35?, Eduardo Habkost, 2017/07/10
- Re: [Qemu-devel] change x86 default machine type to Q35?, Thomas Huth, 2017/07/11
- Re: [Qemu-devel] change x86 default machine type to Q35?, Marcel Apfelbaum, 2017/07/11
- Re: [Qemu-devel] change x86 default machine type to Q35?, Gerd Hoffmann, 2017/07/11
- Re: [Qemu-devel] change x86 default machine type to Q35?, Kevin Wolf, 2017/07/11
- Re: [Qemu-devel] change x86 default machine type to Q35?, Paolo Bonzini, 2017/07/11
- Re: [Qemu-devel] change x86 default machine type to Q35?, Marcel Apfelbaum, 2017/07/12
- Re: [Qemu-devel] change x86 default machine type to Q35?,
Eduardo Habkost <=
- Re: [Qemu-devel] change x86 default machine type to Q35?, Gerd Hoffmann, 2017/07/12
- Re: [Qemu-devel] change x86 default machine type to Q35?, Marcel Apfelbaum, 2017/07/12
- Re: [Qemu-devel] change x86 default machine type to Q35?, Kevin Wolf, 2017/07/12
- Re: [Qemu-devel] change x86 default machine type to Q35?, Eduardo Habkost, 2017/07/11
Re: [Qemu-devel] change x86 default machine type to Q35?, Daniel P. Berrange, 2017/07/05
Re: [Qemu-devel] change x86 default machine type to Q35?, Laszlo Ersek, 2017/07/05