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SubjectRE: [PATCH 1/3] mce: Add a msg string to the MCE tracepoint
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> > My concern is; on Sandy Bridge, is it safe to gather info about the DIMM
> > location in/from machine check context in a reasonable time span?
>
> Well, what amd64_edac does is "buffer" the required lookup info so
> whenever you get an error, you simply lookup the channel and chip select
> - all ops which can be done in atomic context.

Yes - we could pre-read all the config space registers ahead of time and
save them in memory (none of the values should change - except if the platform
supports hot-plug for memory). Total is only a few Kbytes. Then decode in
machine check context is both safe, and fast.

-Tony


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