From: Jamie Lokier <jamie@shareable.org>
To: Glauber Costa <glommer@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
Avi Kivity <avi@redhat.com>, kvm-devel <kvm@vger.kernel.org>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [PATCH v2 4/9] provide in-kernel apic
Date: Fri, 9 Oct 2009 17:48:31 +0100 [thread overview]
Message-ID: <20091009164831.GB7393@shareable.org> (raw)
In-Reply-To: <20091009143031.GU8092@mothafucka.localdomain>
Glauber Costa wrote:
> On Fri, Oct 09, 2009 at 11:06:41AM +0100, Jamie Lokier wrote:
> > Glauber Costa wrote:
> > > > It ensures the two models are compatible. Since they're the same device
> > > > from the point of view of the guest, there's no reason for them to have
> > > > different representations or to be incompatible.
> > >
> > > live migration between something that has in-kernel irqchip and
> > > something that has not is likely to be a completely untested
> > > thing. And this is the only reason we might think of it as the same
> > > device. I don't see any value in supporting this combination
> >
> > Not just live migration. ACPI sleep + savevm + loadvm + ACPI resume,
> > for example.
> Yes, but in this case too, I'd expect the irqchipness of qemu not to change.
If I've just been sent an image produced by someone running KVM, and
my machine is not KVM-capable, or I cannot upgrade the KVM kernel
module because it's in use by other VMs (had this problem a few
times), there's no choice but to change the irqchipness.
-- Jamie
next prev parent reply other threads:[~2009-10-09 16:48 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-07 22:08 [Qemu-devel] [PATCH v2] Add in-kernel irqchip Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 1/9] add base-addr field to io apic state Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 2/9] Save missing fields in VMState Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 3/9] provide in-kernel ioapic Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 4/9] provide in-kernel apic Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 5/9] provide apic_set_irq_delivered Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 6/9] provide in-kernel i8259 chip Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 7/9] initialize " Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 8/9] Initialize in-kernel irqchip Glauber Costa
2009-10-07 22:08 ` [Qemu-devel] [PATCH v2 9/9] Add -kvm option Glauber Costa
2009-10-07 23:00 ` [Qemu-devel] " Anthony Liguori
2009-10-07 23:14 ` Glauber Costa
2009-10-07 23:28 ` Anthony Liguori
2009-10-12 11:58 ` Gerd Hoffmann
2009-10-12 14:04 ` Anthony Liguori
2009-10-12 15:34 ` Gerd Hoffmann
2009-10-12 16:31 ` Anthony Liguori
2009-10-13 8:05 ` Gerd Hoffmann
2009-10-13 15:33 ` Anthony Liguori
2009-10-13 19:26 ` Markus Armbruster
2009-10-13 20:43 ` Anthony Liguori
2009-10-14 8:08 ` Gerd Hoffmann
2009-10-13 15:36 ` Anthony Liguori
2009-10-13 22:57 ` Jamie Lokier
2009-10-08 14:07 ` Avi Kivity
2009-10-08 14:23 ` Anthony Liguori
2009-10-08 14:30 ` Avi Kivity
2009-10-08 14:33 ` Anthony Liguori
2009-10-08 14:41 ` Avi Kivity
2009-10-08 14:56 ` Anthony Liguori
2009-10-08 15:05 ` Avi Kivity
2009-10-08 15:14 ` Anthony Liguori
2009-10-12 11:15 ` Gerd Hoffmann
2009-10-08 14:34 ` Gleb Natapov
2009-10-08 12:02 ` [Qemu-devel] Re: [PATCH v2 7/9] initialize i8259 chip Jan Kiszka
2009-10-08 13:55 ` [Qemu-devel] Re: [PATCH v2 4/9] provide in-kernel apic Anthony Liguori
2009-10-08 14:09 ` Avi Kivity
2009-10-08 14:22 ` Glauber Costa
2009-10-09 10:06 ` Jamie Lokier
2009-10-09 14:30 ` Glauber Costa
2009-10-09 16:48 ` Jamie Lokier [this message]
2009-10-09 18:06 ` Glauber Costa
2009-10-09 19:49 ` Anthony Liguori
2009-10-11 9:10 ` Avi Kivity
2009-10-12 13:41 ` Anthony Liguori
2009-10-08 14:26 ` Anthony Liguori
2009-10-08 14:31 ` Avi Kivity
2009-10-08 14:39 ` Anthony Liguori
2009-10-08 14:46 ` Glauber Costa
2009-10-08 14:44 ` Glauber Costa
2009-10-08 11:46 ` [Qemu-devel] Re: [PATCH v2 3/9] provide in-kernel ioapic Jan Kiszka
2009-10-08 13:49 ` Anthony Liguori
2009-10-08 13:54 ` Avi Kivity
2009-10-08 15:53 ` Jan Kiszka
2009-10-08 16:07 ` Jamie Lokier
2009-10-08 16:12 ` Anthony Liguori
2009-10-08 16:17 ` Avi Kivity
2009-10-08 16:22 ` Gleb Natapov
2009-10-08 16:29 ` Avi Kivity
2009-10-08 16:34 ` Gleb Natapov
2009-10-08 16:42 ` Avi Kivity
2009-10-08 17:11 ` Gleb Natapov
2009-10-09 10:02 ` Jamie Lokier
2009-10-09 12:02 ` Gleb Natapov
2009-10-09 14:32 ` Glauber Costa
2009-10-09 16:49 ` Jamie Lokier
[not found] ` <m31vlctk9q.fsf@neno.mitica>
2009-10-09 21:34 ` Glauber Costa
2009-10-12 13:20 ` Anthony Liguori
2009-10-12 14:18 ` Jamie Lokier
2009-10-12 14:49 ` Anthony Liguori
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