From: Arnd Bergmann <arnd@arndb.de>
To: Jonathan Corbet <corbet@lwn.net>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH/RFC] msleep() with hrtimers
Date: Mon, 16 Jul 2007 01:10:56 +0200 [thread overview]
Message-ID: <200707160110.56810.arnd@arndb.de> (raw)
In-Reply-To: <19044.1184539364@lwn.net>
On Monday 16 July 2007, Jonathan Corbet wrote:
> Here's another approach: a reimplementation of msleep() and
> msleep_interruptible() using hrtimers. On a system without real
> hrtimers this code will at least drop down to single-jiffy delays much
> of the time (though not deterministically so). On my x86_64 system with
> Thomas's hrtimer/dyntick patch applied, msleep(1) gives almost exactly
> what was asked for.
This reminds me of a patch I did some time ago, without ever getting
any feedback on it:
http://lkml.org/lkml/2007/3/4/165
In addition to just msleep, it converted all users of schedule_timeout()
as well as sys_*select(). I actually ran with that patch on my
main worstation for a few weeks, and while it did not crash, I
saw some strange behaviour after all.
Arnd <><
next prev parent reply other threads:[~2007-07-15 23:18 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-15 22:42 [PATCH/RFC] msleep() with hrtimers Jonathan Corbet
2007-07-15 23:10 ` Arnd Bergmann [this message]
2007-07-16 10:48 ` Ingo Molnar
2007-07-16 11:39 ` Roman Zippel
2007-07-16 11:47 ` Ingo Molnar
2007-07-16 11:54 ` Roman Zippel
2007-07-16 11:57 ` Ingo Molnar
2007-07-16 12:05 ` Roman Zippel
2007-07-16 12:19 ` Ingo Molnar
2007-07-16 13:00 ` Roman Zippel
2007-07-16 14:09 ` Ingo Molnar
2007-07-16 14:32 ` Roman Zippel
2007-07-16 14:42 ` Jonathan Corbet
2007-07-16 15:18 ` Ingo Molnar
2007-07-16 15:43 ` Roman Zippel
2007-07-16 15:57 ` Ray Lee
2007-07-16 16:08 ` Nish Aravamudan
2007-07-17 4:04 ` Nick Piggin
2007-07-18 17:53 ` Nish Aravamudan
2007-07-16 16:10 ` Ingo Molnar
2007-07-16 16:55 ` Roman Zippel
2007-07-16 17:46 ` Jonathan Corbet
2007-07-20 12:49 ` Roman Zippel
2007-07-16 14:11 ` Roman Zippel
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