Re: [Xen-devel] xen.git branch reorg / success with 2.6.30-rc3 pv_ops dom0

[Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>]

On Mon, 2009-06-15 at 06:21 -0400, Pasi Kärkkäinen wrote:
> 
> It's old Intel P4 CPU with hyperthreading, so one physical CPU, seen
> as two logical CPUs.

Interesting in the light of a comment from Ingo Molnar this morning on
LKML:
> Plus this system is an old P4 HyperThreading dual-socket system: 
> pretty much the only thing HyperThreading is good for on that box is 
> finding SMP races: that CPU can (and will) yield between 
> hyperthreads on arbitrary instruction boundaries - opening up races 
> wide open.

Ian.


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