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Date: Mon, 18 Dec 2000 19:34:05 -0800
From: Tim Wright <timw@splhi.com>
To: Daniel Phillips <phillips@innominate.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC] Semaphores used for daemon wakeup
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In-Reply-To: <0012171922570J.00623@gimli>; from phillips@innominate.de on Sun, Dec 17, 2000 at 01:06:10PM +0100
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On Sun, Dec 17, 2000 at 01:06:10PM +0100, Daniel Phillips wrote:
> This patch illustrates an alternative approach to waking and waiting on
> daemons using semaphores instead of direct operations on wait queues.
> The idea of using semaphores to regulate the cycling of a daemon was
> suggested to me by Arjan Vos.  The basic idea is simple: on each cycle
> a daemon down's a semaphore, and is reactivated when some other task
> up's the semaphore.
[...]
> 
> OK, there it is.  Is this better, worse, or lateral?

Well, I have to confess I'm rather fond of this method, but that could have
something to do with it being how we did it in DYNIX/ptx (Sequent).
It certainly works, and I find it very clear, but of course I'm biased :-)

Tim

--
Tim Wright - timw@splhi.com or timw@aracnet.com or twright@us.ibm.com
"Nobody ever said I was charming, they said "Rimmer, you're a git!"" RD VI
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