Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 send_IPI_mask_bitmask+0xc3/0xe0()

[H. Peter Anvin]

Andi Kleen wrote:
> > You may want to see if this patch fixes the problem; it does *NOT* have 
> > the correct error behaviour (some of the intervening layers don't 
> > propagate errors), but it should make the fault go away.
>
> The alternative would be to just take out those msr_on_cpu() 
> interfaces again. Right now they are useless in the kernel,
> but still cause problems.
>
> They were only added for OpenVZ's vCPUs which they back then
> promised me would hit mainline soon. But that was some time
> ago and there wasn't much progress on this.
>
> -Andi

We still need the equivalent functionality, though.  The midlayer 
(msr_on_cpu) may be pointless, but that doesn't change the fact that 
putting this functionality in the lower layer (smp_call_function_single) 
makes more sense.

	-hpa
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