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    SubjectRe: locking question: do_mmap(), do_munmap()
    Hi,

    On Mon, 11 Oct 1999 12:07:08 -0700 (PDT), kanoj@google.engr.sgi.com
    (Kanoj Sarcar) said:

    >> What about something like a rw-semaphore which protects the vma list:
    >> vma-list modifiers [ie merge_segments(), insert_vm_struct() and
    >> do_munmap()] grab it exclusive, swapper grabs it "shared, starve
    >> exclusive".
    >> All other vma-list readers are protected by mm->mmap_sem.


    > I have tried to follow most of the logic and solutions proposed
    > on this thread.

    It will deadlock.

    --Stephen

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