On Tue, Jun 16, 2020 at 10:33:08PM +0000, Luck, Tony wrote:
> If the BIOS option is left in the default setting, uncorrectable errors found
> by the patrol scrubber are reported with a machine check. Those MSCOD
> and MCACOD signatures are the same ... but that's not important because
> MCi_STATUS.UC==1. So Linux doesn't need to jump through hoops to
> "upgrade" the severity.
No, this is not what I meant: I meant when you have the setting enabled
to downgrade those errors, can they be detected as part of another MCE
being raised...
> > If so, then the adjusting needs to happen inside mce_log().
> So no, this adjust only needs to happen when polling the banks from
> CMCI or periodic timer.
... but since those downgraded errors raise CMCI then the answer to my
question is no.
> The point was to avoid the runtime test for CPU model on every error. But
> this isn't a performance critical path, so we can refactor if you think that
> looks cleaner.
Yes please.
> There is some new set of validation tests running now to check the
> effectiveness
> of this BIOS + OS change. So it may be a while before updated version is
> posted.
Ok, thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
