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    SubjectRe: [PATCH 1/19] MUTEX: Introduce simple mutex implementation
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    On Maw, 2005-12-13 at 13:47 +0100, Oliver Neukum wrote:
    > > spinlock to do the cmpxchg. This means that there wont be one single
    > > global spinlock to emulate cmpxchg, but the mutex's own spinlock can be
    > > used for it.
    >
    > Can't you use the pointer as a hash input?

    Some platforms already do this for certain sets of operations like
    atomic_t. The downside however is that you no longer control the lock
    contention or cache line bouncing. It becomes a question of luck rather
    than science as to how well it scales.

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