Messages in this thread | | | Date | Fri, 17 Oct 2003 17:23:13 -0500 | From | Matt Mackall <> | Subject | Re: [RFC] prevent "dd if=/dev/mem" crash |
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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 : http://www.selenic.com : Linux development and consulting - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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