From: Anthony Liguori <anthony@codemonkey.ws>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Jan Kiszka" <jan.kiszka@siemens.com>, kvm <kvm@vger.kernel.org>,
"Scott Moser" <smoser@ubuntu.com>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
"Michael Tokarev" <mjt@tls.msk.ru>,
qemu-devel <qemu-devel@nongnu.org>,
"Bruce Rogers" <brogers@suse.com>, "Avi Kivity" <avi@redhat.com>,
"Cole Robinson" <crobinso@redhat.com>,
"Daniel P. Berrange" <berrange@redhat.com>,
"Andreas Färber" <afaerber@suse.de>
Subject: Re: [Qemu-devel] [PATCH] kvm: Set default accelerator to "kvm" if the host supports it
Date: Mon, 01 Oct 2012 15:07:48 -0500 [thread overview]
Message-ID: <87lifqufaj.fsf@codemonkey.ws> (raw)
In-Reply-To: <836856249.4545946.1349119506235.JavaMail.root@redhat.com>
Paolo Bonzini <pbonzini@redhat.com> writes:
>> But libguest can set it's accelerator option to whatever it wants.
>>
>> If your running QEMU under a VM, it's pretty reasonable to have to
>> use a special option IMHO.
>
> It's also reasonable to have consecutive releases change defaults in
> a more "friendly" way (i.e. from tcg to kvm:tcg), especially since
> we'll get users that formerly used qemu-kvm and never had to specify
> neither -machine accel nor --enable-kvm.
I agree with you except for the 'kvm:tcg' part.
>
>> > IMHO, default to KVM, fallback to TCG is the most friendly default
>> > behaviour.
>>
>> Except if a user expects good network performance and can't
>> understand why they're getting 100kb/s.
>
> libguestfs doesn't need network at all (though I wonder if they could
> use lxc instead...).
FWIW, libguestfs already uses -machine accel=kvm:tcg so we can
completely the libguestfs use-case for this discussion.
Regards,
Anthony Liguori
>
> Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Anthony Liguori <anthony@codemonkey.ws>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm <kvm@vger.kernel.org>, "Scott Moser" <smoser@ubuntu.com>,
"Jan Kiszka" <jan.kiszka@siemens.com>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
"Michael Tokarev" <mjt@tls.msk.ru>,
qemu-devel <qemu-devel@nongnu.org>,
"Bruce Rogers" <brogers@suse.com>, "Avi Kivity" <avi@redhat.com>,
"Cole Robinson" <crobinso@redhat.com>,
"Andreas Färber" <afaerber@suse.de>
Subject: Re: [Qemu-devel] [PATCH] kvm: Set default accelerator to "kvm" if the host supports it
Date: Mon, 01 Oct 2012 15:07:48 -0500 [thread overview]
Message-ID: <87lifqufaj.fsf@codemonkey.ws> (raw)
In-Reply-To: <836856249.4545946.1349119506235.JavaMail.root@redhat.com>
Paolo Bonzini <pbonzini@redhat.com> writes:
>> But libguest can set it's accelerator option to whatever it wants.
>>
>> If your running QEMU under a VM, it's pretty reasonable to have to
>> use a special option IMHO.
>
> It's also reasonable to have consecutive releases change defaults in
> a more "friendly" way (i.e. from tcg to kvm:tcg), especially since
> we'll get users that formerly used qemu-kvm and never had to specify
> neither -machine accel nor --enable-kvm.
I agree with you except for the 'kvm:tcg' part.
>
>> > IMHO, default to KVM, fallback to TCG is the most friendly default
>> > behaviour.
>>
>> Except if a user expects good network performance and can't
>> understand why they're getting 100kb/s.
>
> libguestfs doesn't need network at all (though I wonder if they could
> use lxc instead...).
FWIW, libguestfs already uses -machine accel=kvm:tcg so we can
completely the libguestfs use-case for this discussion.
Regards,
Anthony Liguori
>
> Paolo
next prev parent reply other threads:[~2012-10-01 20:07 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-30 19:11 qemu-kvm: remove "boot=on|off" drive parameter compatibility Marcelo Tosatti
2012-10-01 1:02 ` Amos Kong
2012-10-01 8:05 ` Jan Kiszka
2012-10-01 9:31 ` Marcelo Tosatti
2012-10-01 10:21 ` Jan Kiszka
2012-10-01 13:03 ` Marcelo Tosatti
2012-10-01 13:14 ` Jan Kiszka
2012-10-01 13:19 ` Anthony Liguori
2012-10-01 13:19 ` [Qemu-devel] " Anthony Liguori
2012-10-01 13:26 ` Jan Kiszka
2012-10-01 13:26 ` [Qemu-devel] " Jan Kiszka
2012-10-03 9:55 ` Gleb Natapov
2012-10-03 9:55 ` Gleb Natapov
2012-10-03 10:06 ` Jan Kiszka
2012-10-03 10:06 ` Jan Kiszka
2012-10-03 10:11 ` Gleb Natapov
2012-10-03 10:11 ` Gleb Natapov
2012-10-03 10:57 ` Lucas Meneghel Rodrigues
2012-10-03 10:57 ` [Qemu-devel] " Lucas Meneghel Rodrigues
2012-10-03 13:19 ` Paolo Bonzini
2012-10-03 13:19 ` [Qemu-devel] " Paolo Bonzini
2012-10-03 13:27 ` Gleb Natapov
2012-10-03 13:27 ` [Qemu-devel] " Gleb Natapov
2012-10-04 10:48 ` Jan Kiszka
2012-10-04 10:48 ` [Qemu-devel] " Jan Kiszka
2012-10-04 12:10 ` Lucas Meneghel Rodrigues
2012-10-04 12:10 ` [Qemu-devel] " Lucas Meneghel Rodrigues
2012-10-04 12:27 ` Jan Kiszka
2012-10-04 12:27 ` [Qemu-devel] " Jan Kiszka
2012-10-04 17:21 ` Lucas Meneghel Rodrigues
2012-10-04 17:21 ` [Qemu-devel] " Lucas Meneghel Rodrigues
2012-10-04 17:24 ` Jan Kiszka
2012-10-04 17:24 ` [Qemu-devel] " Jan Kiszka
2012-10-01 13:31 ` Marcelo Tosatti
2012-10-01 13:31 ` [Qemu-devel] " Marcelo Tosatti
2012-10-01 13:36 ` Jan Kiszka
2012-10-01 13:36 ` [Qemu-devel] " Jan Kiszka
2012-10-01 13:44 ` Michael Tokarev
2012-10-01 13:44 ` [Qemu-devel] " Michael Tokarev
2012-10-01 13:48 ` Jan Kiszka
2012-10-01 13:48 ` [Qemu-devel] " Jan Kiszka
2012-10-01 13:38 ` Paolo Bonzini
2012-10-01 13:38 ` [Qemu-devel] " Paolo Bonzini
2012-10-01 13:46 ` Jan Kiszka
2012-10-01 13:46 ` [Qemu-devel] " Jan Kiszka
2012-10-01 14:04 ` Anthony Liguori
2012-10-01 14:04 ` [Qemu-devel] " Anthony Liguori
2012-10-01 14:34 ` [PATCH] kvm: Set default accelerator to "kvm" if the host supports it Jan Kiszka
2012-10-01 14:34 ` [Qemu-devel] " Jan Kiszka
2012-10-01 16:20 ` Anthony Liguori
2012-10-01 16:20 ` [Qemu-devel] " Anthony Liguori
2012-10-01 16:56 ` Aurelien Jarno
2012-10-01 16:56 ` [Qemu-devel] " Aurelien Jarno
2012-10-03 9:02 ` Jan Kiszka
2012-10-03 9:02 ` [Qemu-devel] " Jan Kiszka
2012-10-03 20:01 ` Blue Swirl
2012-10-03 20:01 ` [Qemu-devel] " Blue Swirl
2012-10-03 20:26 ` Peter Maydell
2012-10-03 20:26 ` Peter Maydell
2012-10-05 1:15 ` Alexander Graf
2012-10-05 1:15 ` Alexander Graf
2012-10-05 2:17 ` Anthony Liguori
2012-10-05 2:17 ` [Qemu-devel] " Anthony Liguori
2012-10-05 2:24 ` Alexander Graf
2012-10-05 2:24 ` Alexander Graf
2012-10-05 8:15 ` Peter Maydell
2012-10-05 8:15 ` Peter Maydell
2012-10-08 14:03 ` Andreas Färber
2012-10-08 14:03 ` Andreas Färber
2012-10-08 14:08 ` Alexander Graf
2012-10-08 14:08 ` Alexander Graf
2012-10-01 16:43 ` Andreas Färber
2012-10-01 16:43 ` Andreas Färber
2012-10-01 16:47 ` Daniel P. Berrange
2012-10-01 16:47 ` Daniel P. Berrange
2012-10-01 19:03 ` Anthony Liguori
2012-10-01 19:03 ` Anthony Liguori
2012-10-01 19:25 ` Paolo Bonzini
2012-10-01 19:25 ` [Qemu-devel] " Paolo Bonzini
2012-10-01 20:07 ` Anthony Liguori [this message]
2012-10-01 20:07 ` Anthony Liguori
2012-10-02 7:46 ` Markus Armbruster
2012-10-02 7:46 ` [Qemu-devel] " Markus Armbruster
2012-10-02 8:15 ` Aurelien Jarno
2012-10-02 8:15 ` Aurelien Jarno
2012-10-03 6:58 ` Michael Tokarev
2012-10-03 6:58 ` Michael Tokarev
2012-10-03 9:05 ` Jan Kiszka
2012-10-03 9:05 ` [Qemu-devel] " Jan Kiszka
2012-10-01 14:07 ` qemu-kvm: remove "boot=on|off" drive parameter compatibility Alexander Graf
2012-10-01 14:07 ` [Qemu-devel] " Alexander Graf
2012-10-01 14:20 ` Paolo Bonzini
2012-10-01 14:20 ` [Qemu-devel] " Paolo Bonzini
2012-10-01 15:39 ` Bruce Rogers
2012-10-01 15:39 ` Bruce Rogers
2012-10-02 8:14 ` Daniel P. Berrange
2012-10-02 8:14 ` [Qemu-devel] " Daniel P. Berrange
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