Re: [PATCH v6 1/2] acpi: apei: Rename ghes_severity() to ghes_cper_severity()

[Alex G.]

On 05/22/2018 01:45 PM, Luck, Tony wrote:
> On Tue, May 22, 2018 at 01:19:34PM -0500, Alex G. wrote:
>> Firmware started passing "fatal" GHES headers with the explicit intent of
>> crashing an OS. At the same time, we've learnt how to handle these errors in
>> a number of cases. With DPC (coming soon to firmware-first) the error is
>> contained, and a non-issue.
> 
> Perhaps DPC is the change that you need to emphasize as to
> why things are different now, so we can change the default
> Linux behavior.
> 
> With the h/w guaranteeing that corrupt data is contained, we
> should be safe to disregard BIOS indications of "fatal" problems
> that could be anything and might show up in unknown ways some
> time later if we keep running.

Sure. DPC is much harder to contest as a reason. However, the AER path
benefits as well from this change in behavior. I'm certain there are
other classes of errors that benefit as well from the change, though I
haven't had the time or the inclination to look for them.

Alex