Re: [Xen-ia64-devel] SMP guest and itc

[Alex Williamson <alex.williamson@xxxxxx>]

On Thu, 2006-02-09 at 08:32 +0100, Tristan Gingold wrote:
> Hi,
> 
> during boot, linux kernel tries to synchronize itc of all processors.  
> However 
> currently itc is not virtualized:
> (XEN) vcpu_set_itc: Setting ar.itc is currently disabled
> 
> What should we do ?
> a) virtualize ITC
> b) para-virtualize ITC (ie, modifying linux kernel)
> c) pre-synchronize ITC
> 
> I really prefer c).

   I'm not sure I understand c).  Aren't the ITCs already
pre-synchronized by xen in smp_callin()?   Thanks,

        Alex

-- 
Alex Williamson                             HP Linux & Open Source Lab


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