memory and /dev/mem

From: Jean Delvare (
Date: Sat Oct 19 2002 - 15:16:44 EST

Hi everyone,

I have a question about /dev/mem. It looks like /dev/mem is actually
shorter that the actual physical memory available on the system, by
about 600 kilobytes (seems to depend on the total size). Is there a
reason for that? It happens that on some systems, the DMI table is
located near the end of the memory, so we are not able to access it. Is
this memory area special?


Jean Delvare
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