Re: Why write CPER_NOTIFY_MCE to ERST when reboot

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Tony and Gerry, thanks!

Regards,
Joe

On 06/01/13 02:29, Luck, Tony wrote:
> Gerry has this right - we want to preserve the error information, but we
> don't trust our kernel enough to have it write to a regular disk (perhaps
> it has no access to I/O because of the error - or worse, perhaps it might
> write to the wrong place or the wrong disk).
> 
> In theory data the information in the machine check banks is preserved
> across a warm reset for the reboot - but in practice we may sometimes
> need a power-cycle and full cold reset. Also I've heard that on some systems
> the BIOS clears the banks before the OS can see them.
> 
> -Tony
> 


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