RE: [RFC PATCH] x86, entry: Switch stacks on a paranoid entry from userspace

[Luck, Tony]

> It could also be interesting to tweak mce_panic to not actually panic
> the machine but to try to return and stop the test instead.  Then real
> debugging could be possible :)

The lost cpu is *really* lost.  Warm reset doesn't fix the machine, I usually
have to do a full power cycle.

-Tony
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