From: Gleb Natapov <gleb@redhat.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] smp: linux guest only sees 1 CPU when not using KVM
Date: Tue, 9 Nov 2010 08:55:01 +0200 [thread overview]
Message-ID: <20101109065501.GD9036@redhat.com> (raw)
In-Reply-To: <87fwvb1m8z.fsf@ginnungagap.bsc.es>
On Mon, Nov 08, 2010 at 11:30:52PM +0100, Lluís wrote:
> Lennart Sorensen writes:
>
> > On Mon, Nov 08, 2010 at 10:57:19PM +0100, Lluís wrote:
> >> Well, thre's nothing more to add than the contents in the subject.
> >>
> >> I tried booting up with -smp 2, and /proc/cpuinfo on the linux guest
> >> only return one CPU, while booting with "-smp 2 -enable-kvm" shows 2
> >> CPUs.
>
> > I was under the impression qemu didn't emulate SMP. KVM on the other
> > hand does support running on real SMP hardware. It doesn't have to
> > emulate SMP after all.
>
> Well, I thought it did when I saw the "-smp" option, and it does in fact
> create multiple CPUState objects, as if the "extra" cpus where
> unplugged.
>
> In fact, cpus.c:cpu_exec_all does indeed loop through all the CPUState
> objects, calling qemu_cpu_exec on each.
>
Yes. Qemu should emulate smp fine. What "info cpus" in monitor shows?
Anything interesting in dmesg?
--
Gleb.
next prev parent reply other threads:[~2010-11-09 6:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-08 21:57 [Qemu-devel] smp: linux guest only sees 1 CPU when not using KVM Lluís
2010-11-08 22:09 ` Lennart Sorensen
2010-11-08 22:30 ` Lluís
2010-11-09 6:55 ` Gleb Natapov [this message]
2010-11-09 13:24 ` Lluís
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