Messages in this thread | | | Subject | Re: [RFC] prevent "dd if=/dev/mem" crash | From | Andreas Schwab <> | Date | Sat, 18 Oct 2003 00:40:48 +0200 |
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"Luck, Tony" <tony.luck@intel.com> writes:
>> 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?
EIO would probably fit better.
Andreas.
-- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." - 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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