Re: [Qemu-devel] smp: linux guest only sees 1 CPU when not using KVM

[xscript@gmx.net (Lluís)]

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.

Lluis

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