Messages in this thread | | | Date | Sun, 9 Mar 2003 20:11:13 -0500 (EST) | From | Zwane Mwaikambo <> | Subject | Re: [PATCH] small fixes in brlock.h |
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On Sun, 9 Mar 2003, Robert Love wrote:
> Yep. Any interrupt, actually. > > Or the reschedule IPI on SMP systems. > > Kernel preemption off an interrupt is actually the most common (and the > ideal) place to preempt since an interrupt is usually what wakes up a > task off I/O and sets need_resched. So kernel preemption lets us > reschedule the higher priority task the moment the interrupt wakes it > up. Of course, if a lock is held, we have to wait till we drop it.
Thanks for clearing that up, i'll probably need to relook at some of my code to be sure.
Zwane -- function.linuxpower.ca - 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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