Re: [PATCH 3/3] mce: acpi/apei: trace: Enable ghes memory error trace event

Borislav Petkov
2013-08-13T12:43:04Z

On Tue, Aug 13, 2013 at 04:51:33PM +0530, Naveen N. Rao wrote:
> You're right - my trace point makes all the data provided by apei
> as-is to userspace. However, ghes_edac seems to squash some of this
> data into a string when reporting through mc_event.

Right, for systems which don't need EDAC to decode to the DIMM or for
which there are no EDAC drivers written, they could use a tracepoint
which carries APEI info as-is. Others, which need EDAC, should probably
use trace_mc_event and disable the APEI tracepoint.

I think this should address Tony's concerns...

Btw, you could call your TP something simpler like
trace_ghes_memory_event or so.

Btw 2, if GHES can report other types of errors (I'm pretty sure it can)
maybe we can use a single tracepoint called trace_ghes_event for any
types of errors coming out of it...

Oh, and while at it, we probably need to start thinking of a mechanism
to disable all the error printing, i.e. cper_print_mem() and such,
if a userspace agent is listening in on the tracepoint and the error
information is carried through it to userspace.

Thanks.

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
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