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    SubjectRe: [2.4.17/18pre] VM and swap - it's really unusable
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    On Fri, 2002-01-11 at 07:37, Alan Cox wrote:

    > Its more than a spinlock cleanup at that point. To do anything useful you have
    > to tackle both priority inversion and some kind of at least semi-formal
    > validation of the code itself. At the point it comes down to validating the
    > code I'd much rather validate rtlinux than the entire kernel

    The preemptible kernel plus the spinlock cleanup could really take us
    far. Having locked at a lot of the long-held locks in the kernel, I am
    confident at least reasonable progress could be made.

    Beyond that, yah, we need a better locking construct. Priority
    inversion could be solved with a priority-inheriting mutex, which we can
    tackle if and when we want to go that route. Not now.

    I want to lay the groundwork for a better kernel. The preempt-kernel
    patch gives real-world improvements, it provides a smoother user desktop
    experience -- just look at the positive feedback. Most importantly,
    however, it provides a framework for superior response with our standard
    kernel in its standard programming model.

    Robert Love

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