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    SubjectRe: Bad interactive behaviour in 2.5.65-66 (sched.c)
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    On Sat, 2003-03-29 at 21:23, Andrew Morton wrote:
    > Tom Sightler <ttsig@tuxyturvy.com> wrote:
    > >
    > > On my system I get a starvation issue with just about any CPU intensive
    > > task. For example if create a bzip'd tar file from the linux kernel
    > > source with the command:
    > >
    > > tar cvp linux | bzip2 -9 > linux.tar.bz2
    > >
    >
    > Ingo has determined that Linus's backboost trick is causing at least some
    > of these problems. Please test and report upon the below patch.
    >[...]
    > From: Ingo Molnar <mingo@elte.hu>
    >
    > the patch below fixes George's setiathome problems (as expected). It
    > essentially turns off Linus' improvement, but i dont think it can be fixed
    > sanely.
    >
    > the problem with setiathome is that it displays something every now and
    > then - so it gets a backboost from X, and hovers at a relatively high
    > priority.

    This fixes the starvation I was getting with xmms visualizers, which
    have a similar usage pattern: they're mostly CPU-bound, but they talk to
    the X server for drawing.

    J

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