From: Andrew Morton <akpm@zip.com.au>
To: yodaiken@fsmlabs.com
Cc: Ingo Molnar <mingo@elte.hu>, Martin Wirth <Martin.Wirth@dlr.de>,
linux-kernel <linux-kernel@vger.kernel.org>, rml <rml@tech9.net>,
nigel <nigel@nrg.org>
Subject: Re: [RFC] New locking primitive for 2.5
Date: Thu, 07 Feb 2002 12:57:19 -0800 [thread overview]
Message-ID: <3C62EA2F.FDA9E241@zip.com.au> (raw)
In-Reply-To: <20020207125601.A21354@hq.fsmlabs.com> <Pine.LNX.4.33.0202072305480.2976-100000@localhost.localdomain>, <Pine.LNX.4.33.0202072305480.2976-100000@localhost.localdomain>; from mingo@elte.hu on Thu, Feb 07, 2002 at 11:09:16PM +0100 <20020207133109.B21935@hq.fsmlabs.com>
yodaiken@fsmlabs.com wrote:
>
> llseek:
> atomic_enquee request
> if no room gotta sleep
> else if trylock mutex
> return
> else
> do work
> loop:
> process any pending requests
> release lock;
> if pending_requests && !(trylock mutex) goto loop
This is how printk() works. It was a very powerful and satisfactory
solution to a nasty locking/atomicity problem. It'd be nice to have
a more generic way of expressing that solution.
-
next prev parent reply other threads:[~2002-02-07 20:58 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-07 15:38 [RFC] New locking primitive for 2.5 Martin Wirth
2002-02-07 18:04 ` Daniel Phillips
2002-02-07 18:06 ` Richard Gooch
2002-02-07 18:22 ` Christoph Hellwig
2002-02-07 19:33 ` Daniel Phillips
2002-02-07 19:55 ` Mark Frazer
2002-02-08 12:24 ` Denis Vlasenko
2002-02-07 18:40 ` Robert Love
2002-02-07 19:25 ` Andrew Morton
2002-02-07 19:51 ` Dave Hansen
2002-02-07 20:06 ` Andrew Morton
2002-02-07 20:11 ` Robert Love
2002-02-07 21:27 ` Ingo Molnar
2002-02-07 19:59 ` Andrew Morton
2002-02-08 8:20 ` Nigel Gamble
2002-02-08 17:06 ` Larry McVoy
2002-02-07 19:58 ` yodaiken
2002-02-07 20:08 ` Robert Love
2002-02-07 20:15 ` yodaiken
2002-02-07 20:20 ` Robert Love
2002-02-07 20:36 ` yodaiken
2002-02-07 20:57 ` Daniel Phillips
2002-02-07 21:00 ` yodaiken
2002-02-07 21:10 ` Daniel Phillips
2002-02-07 20:49 ` Martin Wirth
2002-02-08 8:34 ` Martin Wirth
2002-02-08 18:28 ` Linus Torvalds
2002-02-08 18:12 ` Martin Wirth
2002-02-08 18:33 ` Alexander Viro
2002-02-08 20:02 ` Linus Torvalds
2002-02-08 18:54 ` Andrew Morton
2002-02-08 19:11 ` Linus Torvalds
2002-02-08 19:21 ` Alexander Viro
2002-02-08 19:36 ` Robert Love
2002-02-09 0:18 ` Alexander Viro
2002-02-08 21:23 ` Ingo Molnar
2002-02-08 21:36 ` Linus Torvalds
2002-02-08 20:04 ` Jeff Garzik
2002-02-08 21:16 ` Mike Fedyk
2002-02-09 0:09 ` Alan Cox
2002-02-09 0:05 ` Mike Fedyk
2002-02-08 21:40 ` Benjamin Herrenschmidt
2002-02-09 19:32 ` Linus Torvalds
2002-02-07 19:56 ` yodaiken
2002-02-07 22:09 ` Ingo Molnar
2002-02-07 20:31 ` yodaiken
2002-02-07 20:57 ` Andrew Morton [this message]
2002-02-07 21:02 ` yodaiken
2002-02-08 12:31 ` Christoph Hellwig
2002-02-08 16:51 ` Nigel Gamble
2002-02-08 18:41 ` Andrew Morton
2002-02-08 20:47 ` Ingo Molnar
2002-02-08 18:56 ` Alexander Viro
2002-02-08 20:59 ` Ingo Molnar
2002-02-08 19:10 ` Alexander Viro
2002-02-08 20:14 ` Anton Altaparmakov
2002-02-08 20:38 ` yodaiken
2002-02-08 21:55 ` Anton Altaparmakov
2002-02-08 12:47 ` Denis Vlasenko
2002-02-08 15:13 ` yodaiken
2002-02-08 19:22 ` Horst von Brand
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