Re: [PATCH v2 2/2] mce: acpi/apei: Add a boot option to disable ffmode for corrected errors

From: Borislav Petkov
Date: Thu Jun 20 2013 - 01:35:31 EST

On Wed, Jun 19, 2013 at 10:08:53PM +0000, Luck, Tony wrote:
> > The above question about what to do *without* going to userspace and
> > back is maybe more interesting and we'd need a clean design there...
> > we'll see.
> Yes - this case (where the BIOS did all the threshold math and made the decision)
> should be one where Linux kernel could just implement the action directly.
> Perhaps controlled by a knob to say whether we really trust the BIOS that much.
> But we will also have cases where a smart user agent can correlate data
> from multiple sources to identify the real root cause (e.g. some temperature
> anomalies around the same time as some memory errors that occur at 10am
> on the third Tuesday each month -> cause is air conditioner maintenance guy
> that shuts down the a/c for 10 minutes to change the filter).

Surely we cannot put that in the kernel. For that we'd need userspace to
decide and only turn knobs in the kernel.

> I'll leave writing an agent that smart as an exercise for the concerned data
> center manager :-)

Me too, as long as it stays in userspace and it only turns
knobs/interfaces in the kernel.


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