[RFC] Kdump and memory error handling

[Luck, Tony]

Your first suggestion of a "slim" dump makes the most sense. The
purpose of a crash dump is a research resource to find out why
the system crashed - but in the case of a machine check, we already
have the reasons for the crash captured by the machine check handler.

Perhaps you could include __log_buf[] in the slim crash dump? Assuming
that the machine check is not a result of an uncorrectable error
in this memory range.

-Tony