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    SubjectRe: [patch 12/14] fs: dcache per-bucket dcache hash locking
    Date writes:

    > We can turn the dcache hash locking from a global dcache_hash_lock into
    > per-bucket locking.

    Per bucket locking is typically a bad idea because you get far too
    many locks and you increase cache footprint with all of them. It's
    typically better to use a second much smaller hash table that only has
    locks (by just shifting the hash value down some more)
    Just need to be careful to avoid too much false sharing.


    -- -- Speaking for myself only.

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      Last update: 2009-03-30 14:17    [W:0.017 / U:1.084 seconds]
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