ppc32: Weird process scheduling behaviour with 2.6.24-rc
mingo at elte.hu
Mon Jan 28 23:32:53 EST 2008
* Peter Zijlstra <a.p.zijlstra at chello.nl> wrote:
> > * With CONFIG_FAIR_USER_SCHED disabled, there are severe
> > interactivity hickups with a niced CPU hog and top running. This
> > started with commit 810e95ccd58d91369191aa4ecc9e6d4a10d8d0c8.
> The revert at the bottom causes the wakeup granularity to shrink for +
> nice and to grow for - nice. That is, it becomes easier to preempt a +
> nice task, and harder to preempt a - nice task.
i think it would be OK to do half of this: make it easier to preempt a
+nice task. Michel, do you really need the -nice portion as well? It's
not a problem to super-preempt positively reniced tasks, but it can be
quite annoying if negatively reniced tasks have super-slices.
More information about the Linuxppc-dev