> It depends if the MSR may be considered global, or is required to be 
> per-cpu.  Need to refresh my memory on this, but I remember reading this 

Machine Check MSRs need to be per CPU. The latest kernels have some support
for "shared banks" (between CPUs) but it's better to not have it and
older OS don't like it.

-Andi
-- 
[email protected] -- Speaking for myself only.
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