From: Eduardo Habkost <ehabkost@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>,
Thomas Huth <thuth@redhat.com>,
zhang.zhanghailiang@huawei.com,
Ben Warren <ben@skyportsystems.com>,
qemu-trivial@nongnu.org, Cornelia Huck <cohuck@redhat.com>,
qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore
Date: Mon, 25 Jun 2018 16:51:26 -0300 [thread overview]
Message-ID: <20180625195126.GN7451@localhost.localdomain> (raw)
In-Reply-To: <97504b42-9ebe-45c5-6ff3-b43102c8374a@redhat.com>
On Mon, Jun 25, 2018 at 08:26:28PM +0200, Paolo Bonzini wrote:
> On 25/06/2018 19:30, Eduardo Habkost wrote:
> >>> Attentive distros could even replace the wrapper script by a link.
> >> If they are okay with replacing the "KVM only" semantics with "KVM or
> >> TCG", which I think is generally worse.
> >
> > If we can't get agreement on what's the right default for each
> > QEMU binary, I think that's yet another reason to document that
> > upstream QEMU won't guarantee ABI compatibility if -accel is
> > omitted.
>
> Before that we should ask what the benefit is in changing the default
> for qemu-system-*. Nobody is using it in practice to start QEMU with
> KVM enabled...
How can you be sure? If qemu-system-* is installed with KVM
compiled in, libvirt will probe it using
"-machine none,accel=kvm:tcg" and run the VM using
"-machine $MACHINE,accel=kvm".
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.
--
Eduardo
next prev parent reply other threads:[~2018-06-25 19:51 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-13 5:05 [Qemu-devel] [PATCH 0/4] Clean up accelerator options Thomas Huth
2018-06-13 5:05 ` [Qemu-devel] [PATCH 1/4] Replace '-machine accel=xyz' with '-accel xyz' Thomas Huth
2018-06-13 12:20 ` Eric Blake
2018-06-13 12:48 ` Paolo Bonzini
2018-06-13 12:53 ` Thomas Huth
2018-06-13 13:54 ` Paolo Bonzini
2018-06-13 14:12 ` Thomas Huth
2018-06-13 16:10 ` Eduardo Habkost
2018-06-13 13:38 ` Stefan Hajnoczi
2018-06-13 5:05 ` [Qemu-devel] [PATCH 2/4] Replace '-enable-kvm' with '-accel kvm' in docs and help texts Thomas Huth
2018-06-13 12:51 ` Paolo Bonzini
2018-06-13 13:38 ` Stefan Hajnoczi
2018-06-13 5:05 ` [Qemu-devel] [PATCH 3/4] qemu-options: Improve the documentation of '-accel' and '-machine accel=...' Thomas Huth
2018-06-13 13:38 ` Stefan Hajnoczi
2018-06-13 5:05 ` [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore Thomas Huth
2018-06-13 12:51 ` Paolo Bonzini
2018-06-13 13:38 ` Stefan Hajnoczi
2018-06-13 13:44 ` Daniel P. Berrangé
2018-06-13 15:11 ` Thomas Huth
2018-06-13 15:19 ` Daniel P. Berrangé
2018-06-13 15:44 ` Thomas Huth
2018-06-13 16:02 ` Markus Armbruster
2018-06-19 15:15 ` Cornelia Huck
2018-06-19 16:16 ` Paolo Bonzini
2018-06-22 18:11 ` Eduardo Habkost
2018-06-22 19:19 ` Thomas Huth
2018-06-22 19:35 ` Eduardo Habkost
2018-06-22 21:22 ` Paolo Bonzini
2018-06-25 6:50 ` Markus Armbruster
2018-06-25 10:28 ` Paolo Bonzini
2018-06-25 17:30 ` Eduardo Habkost
2018-06-25 18:26 ` Paolo Bonzini
2018-06-25 19:51 ` Eduardo Habkost [this message]
2018-06-26 5:57 ` Paolo Bonzini
2018-06-26 12:29 ` Eduardo Habkost
2018-06-26 13:05 ` Paolo Bonzini
2018-06-26 16:06 ` Eduardo Habkost
2018-06-26 16:10 ` Daniel P. Berrangé
2018-06-27 8:39 ` Paolo Bonzini
2018-06-27 14:05 ` Eduardo Habkost
2018-06-26 4:40 ` Thomas Huth
2018-06-26 7:50 ` Cornelia Huck
2018-06-26 12:56 ` Eduardo Habkost
2018-06-26 16:43 ` Markus Armbruster
2018-06-27 8:49 ` Paolo Bonzini
2018-06-13 13:39 ` [Qemu-devel] [PATCH 0/4] Clean up accelerator options Stefan Hajnoczi
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