RE: pstore dump inside an nmi handler

[Luck, Tony]

> EFI can't sleep (at least, not as far as the kernel's concerned), so 
> we're safe there. I think it's fair to assume atomicity here - crash 
> dumping is a pretty specific situation. Although we may need to think 
> about whether pstore should be saving reboot and poweroff in that case.

Hitachi engineers were very vocal about wanting the reboot/poweroff
logs (so they could deal with customers who accidentally rebooted the
wrong machine, and then denied doing so while also logging reports
that the victim machine had spontaneously reset).

-Tony
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