Messages in this thread Patch in this message | | | Date | Sat, 20 Dec 2003 20:22:38 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 1/5] 2.6.0 fix preempt ctx switch accounting |
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* Nick Piggin <piggin@cyberone.com.au> wrote:
> Make sure to count kernel preemption as a context switch. A short cut > has been preventing it.
i'd prefer the much simpler patch below. This also keeps the kernel preemption logic isolated instead of mixing it into the normal path.
Ingo
--- linux/kernel/sched.c.orig +++ linux/kernel/sched.c @@ -1520,8 +1520,10 @@ need_resched: * if entering off of a kernel preemption go straight * to picking the next task. */ - if (unlikely(preempt_count() & PREEMPT_ACTIVE)) + if (unlikely(preempt_count() & PREEMPT_ACTIVE)) { + prev->nivcsw++; goto pick_next_task; + } switch (prev->state) { case TASK_INTERRUPTIBLE: - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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