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Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not sho
From: |
Eduardo Habkost |
Subject: |
Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore |
Date: |
Tue, 26 Jun 2018 13:06:23 -0300 |
User-agent: |
Mutt/1.9.2 (2017-12-15) |
On Tue, Jun 26, 2018 at 03:05:33PM +0200, Paolo Bonzini wrote:
> On 26/06/2018 14:29, Eduardo Habkost wrote:
> > On Tue, Jun 26, 2018 at 07:57:18AM +0200, Paolo Bonzini wrote:
> >> On 25/06/2018 21:51, Eduardo Habkost wrote:
> >>> In either case, I'm not arguing (yet) for changing the default
> >>> upstream. I'm just arguing for upstream QEMU to not make any
> >>> promises about the default.
> >>
> >> It would be a guest ABI breakage for TCG guests, so it would only apply
> >> to new machine types. I don't think it's worth the complication.
> >
> > That's exactly the point: I want to stop promising a stable guest
> > ABI when the accelerator is omitted, because I see no benefit in
> > wasting energy on this.
>
> On the other hand I see no benefit in changing a default that people are
> obviously not using (since most people use KVM, not TCG). Distros will
> keep shipping, and people will keep using qemu-kvm even if we change the
> default.
Not changing the default is different from promising we will keep
ABI compatibility if the accelerator is omitted. I just want to
get rid of the latter.
> > (I don't think we ever kept the guest ABI correctly with TCG, by
> > the way.)
>
> It would not be any different from KVM. Less tested and likely to be
> more buggy, yes, but not particularly harder.
We can keep trying to not break it when "-accel tcg" is
explicitly provided.
--
Eduardo
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, (continued)
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Eduardo Habkost, 2018/06/22
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Paolo Bonzini, 2018/06/22
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Markus Armbruster, 2018/06/25
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Paolo Bonzini, 2018/06/25
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Eduardo Habkost, 2018/06/25
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Paolo Bonzini, 2018/06/25
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Eduardo Habkost, 2018/06/25
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Paolo Bonzini, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Eduardo Habkost, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Paolo Bonzini, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore,
Eduardo Habkost <=
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Daniel P . Berrangé, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Paolo Bonzini, 2018/06/27
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Eduardo Habkost, 2018/06/27
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Thomas Huth, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Cornelia Huck, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Eduardo Habkost, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Markus Armbruster, 2018/06/26
- Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore, Paolo Bonzini, 2018/06/27
Re: [Qemu-trivial] [PATCH 0/4] Clean up accelerator options, Stefan Hajnoczi, 2018/06/13