From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Multiple instances of Qemu on Windows multicore
Date: Wed, 02 Nov 2011 17:25:05 +0100 [thread overview]
Message-ID: <j8rqt1$mc2$1@dough.gmane.org> (raw)
In-Reply-To: <4EB1640F.2090604@adacore.com>
On 11/02/2011 04:38 PM, Fabien Chouteau wrote:
> Hello fellow Qemu aficionados,
>
> On Windows, Qemu sets the affinity mask in order to run all thread on
> CPU0, with this comment in the code (os-win32.c:182):
>
> /* Note: cpu_interrupt() is currently not SMP safe, so we force
> QEMU to run on a single CPU */
>
> This was added by Fabrice Bellard in 2006 (git show a8e5ac33d).
>
> I can't find/understand any reason for this CPU affinity restriction.
Have you tried looking for a justification in the mailing lists? Also,
I suppose you have tested without the affinity mask and it works?
Offhand I cannot think of why that would be needed.
Paolo
next prev parent reply other threads:[~2011-11-02 16:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-02 15:38 [Qemu-devel] Multiple instances of Qemu on Windows multicore Fabien Chouteau
2011-11-02 16:25 ` Paolo Bonzini [this message]
2011-11-02 17:10 ` Fabien Chouteau
2011-11-02 17:16 ` malc
2011-11-02 17:45 ` Paolo Bonzini
2011-11-02 17:55 ` malc
2011-11-02 18:01 ` Peter Maydell
2011-11-02 19:52 ` Paolo Bonzini
2011-11-02 19:57 ` Peter Maydell
2011-11-03 9:56 ` Fabien Chouteau
2011-11-03 9:54 ` Fabien Chouteau
2011-11-03 10:10 ` Paolo Bonzini
2011-11-03 10:29 ` Avi Kivity
2011-11-03 11:50 ` Paolo Bonzini
2011-11-04 9:27 ` Fabien Chouteau
2011-11-04 9:34 ` Paolo Bonzini
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