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    SubjectRe: TASK_UNMAPPED_BASE & stack location
    >> >> 128Mb of it? The bottom page, or even a few Mb, sure ... 
    >> >> but 128Mb seems somewhat excessive ..
    >
    > Yes.
    >
    >> > Considering that your process space is 4gig, and that that 128Mb
    >> > doesn't really exist anywhere (no RAM, no page table entries,
    >> > nothing), it's really not excessive.
    >>
    >> I need the virtual space.
    >
    > Plus you would (very often) get more physical. i386 ELF text typically
    > begins at 0x08048000: putting stack just below text in many cases shares
    > page table between stack+text+data, and saves the page table at top of
    > user address space.

    A fine point - I hadn't thought of that.
    It just seems tidier all around ....

    M.

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