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Date: Sun, 9 Mar 2003 20:11:13 -0500 (EST)
From: Zwane Mwaikambo <zwane@linuxpower.ca>
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To: Robert Love <rml@tech9.net>
cc: Linux Kernel <linux-kernel@vger.kernel.org>,
       Linus Torvalds <torvalds@transmeta.com>
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
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