From: Paolo Bonzini <pbonzini@redhat.com>
To: Markus Armbruster <armbru@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Jason Baron <jbaron@redhat.com>,
qemu-devel@nongnu.org, Alexander Graf <agraf@suse.de>,
Gerd Hoffmann <kraxel@redhat.com>,
Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: [Qemu-devel] On block interface types in general, IF_AHCI in particular
Date: Wed, 31 Oct 2012 15:40:48 +0100 [thread overview]
Message-ID: <50913870.2090607@redhat.com> (raw)
In-Reply-To: <87ehkelo38.fsf@blackfin.pond.sub.org>
Il 31/10/2012 15:20, Markus Armbruster ha scritto:
> One more thing: on a *major* upgrade, I'd rather deal with immediately
> obvious breakage (does not boot) than rotten performance.
>
> If we make "q35 with compat IDE" the default, we'll have to tell users
> many, many times not to use the default :(
Well, compat IDE is not on the same league as writethrough for bad
performance, and virtio is anyway the better choice (and not available
just with a different machine type).
If they complain we should send them to virtio just as likely. And
perhaps we should send them straight to libvirt and libosinfo. Because
in some time we'll probably have the same problem with virtio-scsi vs.
virtio-blk (features vs. performance), and externalizing the decision is
the only sane thing to do.
Paolo
next prev parent reply other threads:[~2012-10-31 14:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 14:43 [Qemu-devel] On block interface types in general, IF_AHCI in particular Markus Armbruster
2012-10-30 15:16 ` Jason Baron
2012-10-30 16:31 ` Paolo Bonzini
2012-10-30 17:04 ` Kevin Wolf
2012-10-30 19:03 ` Anthony Liguori
2012-10-30 21:12 ` Anthony Liguori
2012-10-31 13:58 ` Markus Armbruster
2012-10-31 14:01 ` Peter Maydell
2012-10-31 14:09 ` Paolo Bonzini
2012-10-31 14:20 ` Markus Armbruster
2012-10-31 14:40 ` Paolo Bonzini [this message]
2012-10-31 14:43 ` Alexander Graf
2012-10-31 14:46 ` Paolo Bonzini
2012-10-31 16:00 ` Anthony Liguori
2012-10-31 16:05 ` Alexander Graf
2012-10-31 16:46 ` Anthony Liguori
2012-10-31 16:57 ` Alexander Graf
2012-10-31 18:32 ` Anthony Liguori
2012-10-31 16:48 ` Paolo Bonzini
2012-10-31 16:21 ` Kevin Wolf
2012-10-31 16:32 ` Paolo Bonzini
2012-10-31 16:35 ` Alexander Graf
2012-10-31 16:50 ` Paolo Bonzini
2012-11-01 8:50 ` Gerd Hoffmann
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