From: Pavel Machek <pavel@ucw.cz>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <andi@firstfloor.org>, linux-kernel@vger.kernel.org
Subject: Re: better msleep for drivers
Date: Wed, 21 May 2008 12:41:32 +0200 [thread overview]
Message-ID: <20080521104131.GA4948@ucw.cz> (raw)
In-Reply-To: <alpine.LFD.1.10.0805111408440.3197@apollo.tec.linutronix.de>
Hi!
> > Still longer term I suppose there's really no way around having accurate
> > sleep functions and it's probably better to start testing earlier than later.
>
> No objections, but we should not do that with a stupid msleep
> replacement interface; instead we should expose a flexible in kernel
> variant of hrtimer_nanosleep() which lets the user utilize
> ABS/REL_TIME and the different clocks. A msleep helper can be built on
> top of this very easily.
While you are at it... it would be cool to have
'mdelay(2500 msec), but it is okay to wait 100msec more' -- type
interface, so we could use that for nohz benefit.
Currently, mdelay is 'it is okay to wait 10msec more' interface, and
it would be nice to have that explicit.
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2008-05-21 10:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-11 11:01 better msleep for drivers Andi Kleen
2008-05-11 13:43 ` Thomas Gleixner
2008-05-21 10:41 ` Pavel Machek [this message]
2008-05-21 15:24 ` Jeff Garzik
2008-05-21 19:01 ` Pavel Machek
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