PHYSMEM_MAX_ADDR vs crash dump

[Paul Goyette <paul%whooppee.com@localhost>]

I was a bit surprised earlier today... One of my machines crashed, and 
it wrote a dump file.  However, even though this machine's kernel is 
configured with

        options    PHYSMEM_MAX_ADDR=4096

the crash dump contained a full 8GB of memory!

Is this expected?


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