Re: [Xen-devel] NMI with SMP domain causing machine to reboot

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 8 Sep 2005, at 20:33, Santos, Jose Renato G wrote:

>   I have spend most of the last weeks trying to nail down a nasty bug
>   that is preventing me to release xenoprof for SMP domains.
>   The bug is non-deterministic and when it happens the machine just
>   reboots with no message or warning on the serial console.
>   This made the debugging process painfull and slow.
Hard to say from the code, but maybe it's somethign to do with 
hyperthreading? The performance counter MSRs are shared in a weird way 
between hyperthreads. Maybe you're not properly resetting CPU1's perf 
counter and ending up with an NMI storm?
 -- Keir


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