[lkml]   [2003]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    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
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:58    [W:0.027 / U:21.428 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site