RE: [RFC PATCH 0/3] Machine check recovery when kernel accesses poison

From: Luck, Tony
Date: Wed Nov 11 2015 - 17:33:04 EST

> If you know that it is in the nvdimm range, you can grade the error with
> lower severity...

Grading the severity isn't the main issue.

> Or do you mean that without the exception table we'll return back to the
> insn causing the error and loop indefinitely this way?

Yes. We need to NOT return to the instruction that faulted. We need to pick
a different return address. We need to do that inside the #MC handler.

The exception table does that for us.

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