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    SubjectRe: [PATCH] Lightweight userspace semaphores...
    On Thu, Feb 28, 2002 at 04:24:22PM -0800, Richard Henderson wrote:
    > On Wed, Feb 27, 2002 at 10:53:11AM -0500, Hubertus Franke wrote:
    > > As stated above, I allocate a kernel object <kulock_t> on demand and
    > > hash it. This way I don't have to pin any user address. What does everybody
    > > think about the merit of this approach versus the pinning approach?
    > [...]
    > > In your case, can the lock be allocated at different
    > > virtual addresses in the various address spaces.
    >
    > I think this is a relatively important feature. It may not be
    > possible to use the same virtual address in different processes.
    >
    >
    > r~

    I think so too. However let me point that Linus's initial recommendation
    of a handle, comprised of a kernel pointer and a signature also has
    that property.
    Just pointing out the merits of the various approaches.

    -- Hubertus

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