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    SubjectRe: [patch] remove the BKL (Big Kernel Lock), this time for real
    On Thu, 16 Sep 2004 15:29:03 -0700
    Bill Huey (hui) <bhuey@lnxw.com> wrote:

    > FreeBSD-current uses adaptive mutexes. However they spin on that mutex
    > only if the thread owning it is running across another CPU at that time,
    > otherwise it sleeps, maybe priority inherited depending on the
    > circumstance.

    This is how Solaris MUTEX objects work too.
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