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    SubjectRe: must-fix list for 2.6.0
    Maciej Soltysiak <> wrote:
    > > kernel/
    > > -------
    > >
    > > - O(1) scheduler starvation, poor behaviour seems unresolved.
    > >
    > > Jens: "I've been running 2.5.67-mm3 on my workstation for two days, and
    > > it still doesn't feel as good as 2.4. It's not a disaster like some
    > > revisisons ago, but it still has occasional CPU "stalls" where it feels
    > > like a process waits for half a second of so for CPU time. That's is very
    > > noticable."
    > Well, i had similar problems with 2.5 stalling, but now that i disabled
    > preemtible kernel, it is better now. Are there no complaints about preemt?

    I have not heard of any, apart from yours.

    > Also there is one issue, i am not sure if this may be a kernel issue,
    > but with setiathome running in a X desktop environment all apps work fine,
    > but when i run openoffice, openoffice responds with 5 second delay.

    That'll be the changed sched_yield() semantics.

    The below patch should fix that up, but we need to decide whether the (rather
    unclear) advantages of the sched_yield() change outweigh the breakage which
    it caused linuxthreads applications.

    diff -puN kernel/sched.c~sched_yield-hack kernel/sched.c
    --- 25/kernel/sched.c~sched_yield-hack 2003-04-30 12:08:51.000000000 -0700
    +++ 25-akpm/kernel/sched.c 2003-04-30 12:09:11.000000000 -0700
    @@ -1992,7 +1992,7 @@ asmlinkage long sys_sched_yield(void)
    if (likely(!rt_task(current))) {
    dequeue_task(current, array);
    - enqueue_task(current, rq->expired);
    + enqueue_task(current, array);
    } else {
    list_add_tail(&current->run_list, array->queue + current->prio);

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