Messages in this thread Patch in this message | | | Date | Wed, 30 Apr 2003 12:11:05 -0700 | From | Andrew Morton <> | Subject | Re: must-fix list for 2.6.0 |
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Maciej Soltysiak <solt@dns.toxicfilms.tv> 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_del(¤t->run_list); list_add_tail(¤t->run_list, array->queue + current->prio); _
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