From: Matthew Hall <matt-Etm38r6YSMlqcVXhcSD7Ah2eb7JE58TQ@public.gmane.org>
To: tim.c.chen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: Problem with SMP boot
Date: Fri, 26 Jan 2007 06:06:30 +0000 [thread overview]
Message-ID: <45B99A66.4090406@castleinthesky.org> (raw)
In-Reply-To: <1169765044.30807.19.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
Tim Chen wrote:
> Now when I switch to qemu-system-x86_64 without kvm, the guest boots
> with all 4 cpus being specified.
>
>>From the boot log, it looks like it is APIC related.
> Is this a known problem?
Boot the /host/ kernel with 'noapic nolapic' and see if that makes a
difference for you. There is a performance impact under load, but it
made a world of difference for me when I had issues which were similarly
kvm specific.
Matt
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next prev parent reply other threads:[~2007-01-26 6:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-25 22:44 Problem with SMP boot Tim Chen
[not found] ` <1169765044.30807.19.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-01-26 6:06 ` Matthew Hall [this message]
[not found] ` <45B99A66.4090406-Etm38r6YSMlqcVXhcSD7Ah2eb7JE58TQ@public.gmane.org>
2007-01-26 16:59 ` Tim Chen
2007-01-26 17:58 ` Avi Kivity
[not found] ` <45BA413F.5030307-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-01-26 17:54 ` Tim Chen
[not found] ` <1169834079.30807.33.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-01-27 8:40 ` Avi Kivity
2007-01-26 19:02 ` Matthew Hall
[not found] ` <45BA5032.6050100-Etm38r6YSMlqcVXhcSD7Ah2eb7JE58TQ@public.gmane.org>
2007-01-27 8:27 ` Avi Kivity
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