> In both stable and development branches of the kernel, when
That bug has nothing to do with the 2.2.x kernels. It's only a bug
inserted with the scheduler changes inserted in 2.3.29.
>happen when the kernels are compiled this __SMP__. Artur Skawina
><skawina@geocities.com> thinks this might delay servicing interrupts
>unnecessarily. (thanks Artur for your response).
It's not a performance issue but a stability issue.
The below patch is definitely necessary.
> And here's the patch against 2.3.35-pre6:
>--- linux-2.3.35-pre6/kernel/sched.c Fri Dec 10 23:57:11 1999
>+++ linux-2.3.34-post/kernel/sched.c Wed Dec 29 12:34:05 1999
>@@ -273,6 +273,7 @@
> tsk = cpu_curr(this_cpu);
> if (preemption_goodness(tsk, p, this_cpu) > 0)
> tsk->need_resched = 1;
>+ spin_unlock_irqrestore(&runqueue_lock, flags);
> #endif
> }
>
Andrea
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