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    SubjectRe: [RFC] prevent "dd if=/dev/mem" crash
    On Fri, Oct 17, 2003 at 04:10:36PM -0600, Bjorn Helgaas wrote:
    > 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).

    I don't see any reason not to returns zeros. A hole in a file does the
    same thing, after all. The fact that the hole is big makes no difference.

    Matt Mackall : : Linux development and consulting
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