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From: Jes Sorensen <jes@sgi.com>
To: Glauber Costa <glommer@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: change in 'smp_cpus' at runtime vs vcpu_info?
Date: Fri, 26 Sep 2008 16:31:41 +0200	[thread overview]
Message-ID: <48DCF24D.5080709@sgi.com> (raw)
In-Reply-To: <5d6222a80809260728q214c93ddt12f6981cf4780259@mail.gmail.com>

Glauber Costa wrote:
> On Fri, Sep 26, 2008 at 11:17 AM, Jes Sorensen <jes@sgi.com> wrote:
>> Hi,
>>
>> Looking through the KVM qemu code, I see nothing that indicates that
>> smp_cpus can be increased after qemu is initially launched?
>>
>> Does anyone see any reason why we couldn't allocate the vcpu_info
>> array at launch time based on the value of smp_cpus? Right now
>> vcpu_info is a static array and I would love to get rid of this
>> limitation if possible.
> 
> it can increase in hw/apic.c. The real limitation is then in the bios.
> The APIC tables
> used to be populated based on the smp_cpus value, and now are populated based on
> MAX_CPUS.

Hmmm. I don't see any reference to MAX_CPUS in hw/apic.c, any chance you
can give me a pointer?

Thanks,
Jes

  reply	other threads:[~2008-09-26 14:31 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-26 14:17 change in 'smp_cpus' at runtime vs vcpu_info? Jes Sorensen
2008-09-26 14:28 ` Glauber Costa
2008-09-26 14:31   ` Jes Sorensen [this message]
2008-09-26 14:39     ` Glauber Costa
2008-09-26 14:46       ` Jes Sorensen

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