On 02/11/2011 17:25, Paolo Bonzini wrote: > 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?
Yes, and I found few mails from Fabrice Bellard and Konrad Schwarz in the archives: http://thread.gmane.org/gmane.comp.emulators.qemu/13804 and http://thread.gmane.org/gmane.comp.emulators.qemu/13831/focus=13805 But it didn't provide more information about the problem. > > Also, I suppose you have tested without the affinity mask and it works? > Yes I did, it works pretty well. I had 1 unexpected failure among ~6000 tests. But I would like to have a substantial explanation. > > Offhand I cannot think of why that would be needed. > OK, thanks for your help. -- Fabien Chouteau
