[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
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: |
Fri, 7 Jul 2017 10:39:49 -0300 |
User-agent: |
Mutt/1.8.0 (2017-02-23) |
On Wed, Jul 05, 2017 at 12:32:10PM +0300, Marcel Apfelbaum wrote:
> On 05/07/2017 11:14, Thomas Huth wrote:
> > Hi,
> >
>
> Hi,
>
> > On 05.07.2017 08:57, Chao Peng wrote:
> > >
> > > Q35 has been in QEMU for quite a while. Compared to the current default
> > > i440FX, Q35 is probably not that mature and not widely used, however in
> > > some case, Q35 has advantages, for example, in supporting new features.
> > > For instance, we have some features require PCI-e support which is only
> > > available on Q35 and some others need it for EFI support. It is of
> > > course not necessary to change it as the default but if more and more
> > > features have dependencies on Q35 because of requiring much more modern
> > > features then I think it may be worth to do so. In such case we can have
> > > more people to use it and find problems we may know or not know.
> >
>
> Agreed
>
> > Yes, IMHO at one point in time, we should switch the default machine
> > type to q35.
>
> +1
>
> > The i440FX is really quite old...
> >
> > > There are certainly some drawbacks:
> > > - Compatibility: current code or script may need adjustment
> >
> > That might be a real concern ...
>
> I am not so sure about that. Developers working on upstream projects
> should expect such changes and, for our case,
> modifying the command line by adding "-M pc" should not be a big deal.
We could print a warning for 1 or 2 releases when users don't add
a explicit "-M pc" or "-M q35" argument to qemu-system-x86_64,
but:
>
> The upper layers should manage the defaults by themselves so
> are not supposed to be affected.
But they would be. libvirt uses the default machine-type from
QEMU.
> [...]
--
Eduardo
- [Qemu-devel] change x86 default machine type to Q35?, Chao Peng, 2017/07/05
- Re: [Qemu-devel] change x86 default machine type to Q35?, Thomas Huth, 2017/07/05
- Re: [Qemu-devel] change x86 default machine type to Q35?, Marcel Apfelbaum, 2017/07/05
- Re: [Qemu-devel] change x86 default machine type to Q35?,
Eduardo Habkost <=
- Re: [Qemu-devel] change x86 default machine type to Q35?, Michael S. Tsirkin, 2017/07/07
- Re: [Qemu-devel] change x86 default machine type to Q35?, Eduardo Habkost, 2017/07/07
- Re: [Qemu-devel] change x86 default machine type to Q35?, Marcel Apfelbaum, 2017/07/10
- 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