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    SubjectRe: Really good idea to allow mmap(0, FIXED)?
    Date
    On Thursday 05 October 2006 23:58, Alan Cox wrote:
    > Ar Iau, 2006-10-05 am 20:59 +0200, ysgrifennodd Michael Buesch:
    > > Is is really a good idea to allow processes to remap something
    > > to address 0?
    >
    > It is very useful indeed. Consider for example dosemu.

    Ok, good point.

    > > Besides that, I currently don't see a valid reason to mmap address 0.
    > >
    > > Comments?
    >
    > User zero is not neccessarily mapped at kernel zero so your argument
    > isn't portable either.

    Eh, so what about the following.
    We _have_ arches which map user zero to kernel zero. What about
    specialcasing that on a per-arch case. So remapping user zero to
    something else in kernel.

    --
    Greetings Michael.
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