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    SubjectRe: TASK_UNMAPPED_BASE & stack location
    On Fri, 25 Apr 2003, Martin J. Bligh wrote:
    >> Is there any good reason we can't remove TASK_UNMAPPED_BASE, and just shove
    >> libraries directly above the program text? Red Hat seems to have patches to
    >> dynamically tune it on a per-processes basis anyway ...

    On Sat, Apr 26, 2003 at 10:37:11AM -0400, Rik van Riel wrote:
    > What could be done is leave the stack where it is, but have
    > malloc() space and mmap() space grow towards each other:
    > 0 3G
    > | |prog | malloc --> <-- mmap | stack |
    > The stack will get the stack size ulimit size and the space
    > between where malloc and mmap start should be about 2.7 GB.
    > That 2.7 GB will of course by divided between malloc and mmap,
    > but the division will be done dynamically based on whoever
    > needs the space. Much better than the current static 1:1.7
    > division...

    My internal proposals (backed by code) already include this in addition
    to relocating the stack (whose kernel side is trivial).

    -- wli
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