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Date: Tue, 14 Jul 2009 11:21:53 +0200
Message-ID: <5b31733c0907140221l3c2b6b3an1e5ebf79eaeef703@mail.gmail.com>
Subject: Re: [Qemu-devel] [patch 2/2] QEMU BOCHS bios patches to use maxcpus
	value.
From: Filip Navara <filip.navara@gmail.com>
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To: Jes Sorensen <jes@sgi.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, qemu-devel@nongnu.org, Avi Kivity <avi@redhat.com>

On Tue, Jul 14, 2009 at 10:38 AM, Jes Sorensen<jes@sgi.com> wrote:
> On 07/09/2009 11:57 PM, Anthony Liguori wrote:
>>
>> These changes make my Ubuntu server guest very unhappy. =A0I get a bunch
>> of messages about "Not responding." on startup.
>>
>> If nothing else, maxcpus =3D=3Dsmp_cpus under QEMU because we don't do C=
PU
>> hotplug (and I don't think we should).
>
> Anthony,
>
> Sorry haven't gotten back to you earlier as I was on vacation. Are you
> saying the Ubuntu kernel doesn't like having more CPU entries in the
> ACPI table than it actually boots on?
>
> Does the same guest boot using an older KVM setup? Curious since it does
> have the larger CPU table in the DSDT.
>
> Cheers,
> Jes
>

BTW, many other guests complain when ACPI describes more processors
than actually present in machine. That's why I implemented the dynamic
DSDT generation in Bochs BIOS in the first place. One that comes to
mind is MacOS X, or the Darwin kernel respectively.

Best regards,
Filip Navara