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    SubjectRe: pre-2.3.4..
    On Sat, 29 May 1999, Alexander Viro wrote:
    > On Thu, 27 May 1999, Chuck Lever wrote:
    > > attached is a patch that removes the global kernel lock from brk() and
    > > when doing anonymous mmap(). it also reorganizes the locking logic in
    > > handle_pte_fault() to reduce the amount of time spent with the lock held
    > > needlessly. the handle_pte_fault() change may be more dangerous than the
    > > brk() and mmap() changes. it may also be unnecessary with the upcoming
    > > parallelized page cache.
    > Chuck, it's unsafe. do_munmap() called from sys_brk() (or from do_mmap()
    > for that matter) may lead to ->f_count changes, which is *not* the thing
    > you want to do without big lock.

    i don't think it will do this for anonymous maps used by sys_brk().

    - Chuck Lever
    corporate: <>
    personal: <> or <>

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