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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-9

    * Lee Revell <rlrevell@joe-job.com> wrote:

    > On Tue, 2004-11-23 at 18:58 +0100, Ingo Molnar wrote:
    > > i have released the -V0.7.30-9 Real-Time Preemption patch, which can be
    > > downloaded from the usual place:
    > >
    > > http://redhat.com/~mingo/realtime-preempt/
    >
    > I have notices some weird interactivity issues with this. These are
    > also present in T3.
    >
    > The symptom is that CPU bound tasks like kernel compiles will starve
    > I/O bound tasks like evolution for a _long_ time. If I have a kernel
    > build and external modules building at the same time and Evolution
    > goes to "Update message list...", it can sit and spin with a blank
    > message pane for a minute or two. If I suspend the builds, the
    > message list renders immediately.

    could you try the vanilla -rc2-mm2 kernel (with PREEMPT enabled), does
    it behave in such a way too? At first sight this could be a property of
    the upstream scheduler, but maybe it's special to PREEMPT_RT.

    Ingo
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