linux-kernel - Re: [PATCH] msleep() with hrtimers

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Message-ID: <Pine.LNX.4.64.0708060257010.1817@scrub.home>
Date:	Mon, 6 Aug 2007 03:03:50 +0200 (CEST)
From:	Roman Zippel <zippel@...ux-m68k.org>
To:	Arjan van de Ven <arjan@...radead.org>
cc:	Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	akpm@...ux-foundation.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] msleep() with hrtimers

Hi,

On Sun, 5 Aug 2007, Arjan van de Ven wrote:

> Timers are course resolution that is highly HZ-value dependent. For
> cases where you want a finer resolution, the kernel now has a way to
> provide that functionality... so why not use the quality of service this
> provides..

We're going in circles here. We have two different timer APIs for a 
reason, only because hrtimer provide better resolution, doesn't 
automatically make them the better generic timer.
There's no problem to provide a high resolution sleep, but there is also 
no reason to mess with msleep, don't fix what ain't broken...

bye, Roman
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