RE: [2.6.6 PATCH] Exposing EFI memory map

[Luck, Tony]

>2) Can the memory map output ever be larger than PAGE_SIZE (lower
>limit is 4KB on x86)?  If not, what guarantees that?  If so, you need
>your own read mechanism rather than the generic sysfs one.

The output format of the sprintf() gives 58 characters per entry, which
with a 4k page allows for 70 entries before the page overflows, which
feels borderline for ccNUMA machines.  On ia64 the pagesize is usually
16k, which would allow 282 entries.  I think this will fail on a 128
node SGI sn2 (because there are 4 memory banks per node => min 512
entries
in the memory map).

-Tony
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