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    SubjectRe: [PATCH 1/19] MUTEX: Introduce simple mutex implementation
    On Fri, 2005-12-16 at 14:19 -0800, Linus Torvalds wrote:
    > On Fri, 16 Dec 2005, Thomas Gleixner wrote:
    > >
    > > Well, in case of a semaphore it is a semantically correct use case. In
    > > case of of a mutex it is not.
    > I disagree.
    > Think of "initialization" as a user. The system starts out initializing
    > stuff, and as such the mutex should start out being held. It's that
    > simple. It _is_ mutual exclusion, with one user being the early bootup
    > state.

    That's stretching it quite a bit. So you are saying that the owner is
    the first swapper task, from the booting CPU? Well, you better have
    that same process unlock that mutex, since a mutex has a owner and the
    owner _must_ be the one to unlock it. And in lots of these cases, it's
    some other thread that releases the lock.

    With mutexs, the owner is not a state, but a task.

    -- Steve

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      Last update: 2005-12-16 23:35    [W:0.019 / U:184.076 seconds]
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