Messages in this thread | | | Subject | RE: [RFC] prevent "dd if=/dev/mem" crash | Date | Fri, 17 Oct 2003 15:19:49 -0700 | From | "Luck, Tony" <> |
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> I expect there are probably different opinions about the idea > that "dd if=/dev/mem" exits without doing anything. Sparc and > 68K have nearby code that bit-buckets writes and returns zeroes > for reads of page zero. We could do that, too, but it seems like > kind of a hack, and holes on ia64 can be BIG (on the order of > 256GB for one box).
Filling in the holes does seem like a bad idea, but so does returning EOF when you hit a hole (which is what I think your patch is doing).
Would ENODEV be better?
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