RE: CPER support for 32GiB 64GiB DIMMs

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> Matt Fleming mentioned to me that Tony Luck recently fixed a 
> compatibility issue with Memory Error Record structure.
> I ask, how do we want to handle the processing of a CPER
> memory error record with support for larger DIMMs?

I looked at this a bit when I was making the compatibility patch.

The problem is how to take the larger value and report it to
user space.  We have all hard-coded field widths in the
trace structure used that make this non-trivial at the moment.

Supposedly there are changes coming to the perf infrastructure
that will make it easier in the future to widen a field from u16 to
u32.

See http://lkml.org/lkml/2015/6/24/715

Maybe the future Steven described is here now, and someone
can go in and fix the logging event and rasdaemon?

-Tony


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