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

[Ingo Molnar]

* Lee Revell <rlrevell@xxxxxxxxxxx> 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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