From: Matthew Wilcox <willy@debian.org>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Matthew Wilcox <willy@debian.org>,
Oliver Neukum <oliver@neukum.name>,
Thunder from the hill <thunder@ngforever.de>,
Greg KH <greg@kroah.com>,
kernel-janitor-discuss
<kernel-janitor-discuss@lists.sourceforge.net>,
linux-kernel@vger.kernel.org
Subject: Re: BKL removal
Date: Mon, 8 Jul 2002 13:29:30 +0100 [thread overview]
Message-ID: <20020708132930.R27706@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <3D28FE72.1080603@us.ibm.com>; from haveblue@us.ibm.com on Sun, Jul 07, 2002 at 07:52:34PM -0700
On Sun, Jul 07, 2002 at 07:52:34PM -0700, Dave Hansen wrote:
> Well, I certainly have the hardware to measure the difference. But, I
> seem to remember several conversations in the past where people didn't
> like this behavior.
> http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&threadm=linux.kernel.3C62DABA.3020906%40us.ibm.com
I think this is a very different philosophy. That's "well, this should
be a spinlock, but sometimes we sleep, and we don't want to think about
it too hard, so let's invent a magical lock". This is "sometimes we
don't hold semaphores for very long so we can improve performance by
spinning 1000 times before sleeping".
--
Revolutions do not require corporate support.
next prev parent reply other threads:[~2002-07-08 12:26 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44L.0207061306440.8346-100000@imladris.surriel.com>
[not found] ` <3D27390E.5060208@us.ibm.com>
2002-07-07 20:55 ` BKL removal Greg KH
2002-07-07 21:28 ` Oliver Neukum
2002-07-07 21:58 ` Dave Hansen
2002-07-07 22:38 ` Oliver Neukum
2002-07-07 21:35 ` Dave Hansen
2002-07-07 21:55 ` Thunder from the hill
2002-07-07 22:42 ` Dave Hansen
2002-07-07 23:07 ` Thunder from the hill
2002-07-07 23:23 ` Dave Hansen
2002-07-07 23:34 ` Thunder from the hill
2002-07-07 23:42 ` Sean Neakums
2002-07-07 23:31 ` Oliver Neukum
2002-07-07 23:45 ` Dave Hansen
2002-07-08 2:34 ` Matthew Wilcox
2002-07-08 2:52 ` Dave Hansen
2002-07-08 3:06 ` Alexander Viro
2002-07-08 12:33 ` Matthew Wilcox
2002-07-08 14:53 ` Dave Hansen
2002-07-08 12:29 ` Matthew Wilcox [this message]
2002-07-08 2:58 ` Alexander Viro
2002-07-08 3:06 ` Dave Hansen
2002-07-08 12:15 ` Matthew Wilcox
2002-07-08 6:34 ` Oliver Neukum
2002-07-07 23:23 ` Oliver Neukum
2002-07-07 23:31 ` Dave Hansen
2002-07-07 23:51 ` Greg KH
2002-07-08 0:07 ` Dave Hansen
2002-07-08 2:12 ` Greg KH
2002-07-09 1:46 ` Rick Lindsley
2002-07-09 4:38 ` Greg KH
2002-07-09 19:31 ` Rick Lindsley
2002-07-09 20:17 ` Greg KH
2002-07-09 20:55 ` Rick Lindsley
2002-07-09 21:00 ` William Lee Irwin III
2002-07-09 21:12 ` Robert Love
2002-07-09 14:19 ` Dave Hansen
2002-07-09 21:29 ` Robert Love
2002-07-09 14:44 ` Dave Hansen
2002-07-09 21:47 ` Robert Love
2002-07-10 1:15 ` Arnaldo Carvalho de Melo
2002-07-10 3:27 ` Alexander Viro
2002-07-09 20:49 ` Dave Hansen
2002-07-10 5:30 ` Alexander Viro
2002-07-10 10:28 ` Sandy Harris
2002-07-18 0:30 ` David Wagner
2002-07-18 1:03 ` Daniel Phillips
2002-07-09 21:59 ` William Lee Irwin III
2002-07-09 22:21 ` Alan Cox
2002-07-10 13:31 ` jlnance
2002-07-10 14:17 ` Alan Cox
2002-07-15 20:53 ` Alexander Hoogerhuis
2002-07-15 22:07 ` Rik van Riel
2002-07-15 22:25 ` Thunder from the hill
2002-07-09 19:33 ` Rick Lindsley
2002-07-09 20:12 ` Greg KH
2002-07-09 4:49 ` Drew P. Vogel
2002-07-09 5:25 ` Dave Hansen
2002-07-09 5:21 ` Larry McVoy
2002-07-09 7:59 ` Roman Zippel
2002-07-10 10:03 ` Marco Colombo
2002-07-10 14:40 ` Matthew Wilcox
2002-07-10 16:46 ` William Lee Irwin III
2002-07-11 9:57 ` Marco Colombo
2002-07-10 21:28 ` Rick Lindsley
2002-07-10 22:24 ` Daniel Phillips
2002-07-10 23:36 ` spinlock assertion macros Jesse Barnes
2002-07-11 0:54 ` Andreas Dilger
2002-07-11 1:10 ` Jesse Barnes
2002-07-11 5:31 ` Daniel Phillips
2002-07-11 7:19 ` george anzinger
2002-07-11 16:35 ` Oliver Xymoron
2002-07-11 23:52 ` Sandy Harris
2002-07-12 0:56 ` Daniel Phillips
2002-07-12 3:22 ` Oliver Xymoron
2002-07-11 18:03 ` Jesse Barnes
2002-07-11 19:17 ` Daniel Phillips
2002-07-12 12:07 ` Dave Jones
2002-07-12 12:55 ` Daniel Phillips
2002-07-12 19:24 ` Arnd Bergmann
2002-07-12 17:42 ` Daniel Phillips
2002-07-17 2:22 ` Jesse Barnes
2002-07-17 6:34 ` Daniel Phillips
2002-07-18 23:36 ` [PATCH] spinlock assertion macros for 2.5.26 Jesse Barnes
2002-07-17 11:09 ` spinlock assertion macros Arnd Bergmann
2002-07-12 20:41 ` Oliver Xymoron
2002-07-13 3:21 ` Daniel Phillips
2002-07-12 17:49 ` Robert Love
2002-07-12 17:58 ` Dave Jones
2002-07-11 10:51 ` Arnd Bergmann
2002-07-07 22:24 ` BKL removal Greg KH
2002-07-08 0:56 ` Bernd Eckenfels
2002-07-10 0:30 ` Pavel Machek
2002-07-10 7:32 dan carpenter
[not found] <0C01A29FBAE24448A792F5C68F5EA47D2B0C8A@nasdaq.ms.ensim.com>
2002-07-08 19:00 ` pmenage
2002-07-08 21:45 ` Oliver Neukum
[not found] <3D23F306.50703@us.ibm.com>
2002-07-04 12:41 ` Matthew Wilcox
2002-07-04 18:44 ` Dave Hansen
2002-07-04 18:56 ` Dave Hansen
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