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    SubjectRe: spin_lock and linux philosophy question...
       Date:   Mon, 13 Sep 1999 06:19:10 -0700 (PDT)
    From: Robert Dinse <>

    But that brings up a larger question of why there are spin
    locks at all? If a CPU can't be doing one thing because a
    particular resource is unavailable being used by another CPU, why
    isn't it then sent off to do something else?

    Please read "Unix Systems for Modern Architectures" by Curt Schimmel
    for a good primer on spinlocks and why they are used in an OS.

    David S. Miller

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