From: Daniel Phillips <phillips@bonn-fries.net>
To: Rik van Riel <riel@conectiva.com.br>
Cc: Kurt Garloff <garloff@suse.de>, Jan Harkes <jaharkes@cs.cmu.edu>,
Marcelo Tosatti <marcelo@conectiva.com.br>,
<linux-kernel@vger.kernel.org>
Subject: Re: page_launder() on 2.4.9/10 issue
Date: Thu, 6 Sep 2001 19:22:53 +0200 [thread overview]
Message-ID: <20010906171545Z16135-26183+15@humbolt.nl.linux.org> (raw)
In-Reply-To: <Pine.LNX.4.33L.0109061356280.31200-100000@imladris.rielhome.conectiva>
In-Reply-To: <Pine.LNX.4.33L.0109061356280.31200-100000@imladris.rielhome.conectiva>
On September 6, 2001 06:57 pm, Rik van Riel wrote:
> On Thu, 6 Sep 2001, Daniel Phillips wrote:
>
> > Err, not quite the whole story. It is *never* right to leave the disk
> > sitting idle while there are dirty, writable IO buffers.
>
> Define "idle" ?
Idle = not doing anything. IO queue is empty.
> Is idle the time it takes between two readahead requests
> to be issued, delaying the second request because you
> just moved the disk arm away ?
Which two readahead requests? It's idle.
> Is idle when we haven't had a request for, say, 3 disk
> seek time periods ?
See above definition of idle.
> Is idle when we won't be getting any request soon for the
> area where the disk arm is hanging out ? (and how do we
> know the future?)
--
Daniel
next prev parent reply other threads:[~2001-09-06 17:15 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-28 3:36 page_launder() on 2.4.9/10 issue Marcelo Tosatti
2001-08-28 18:07 ` Daniel Phillips
2001-08-28 18:17 ` Linus Torvalds
2001-08-30 1:36 ` Daniel Phillips
2001-09-03 14:57 ` Marcelo Tosatti
2001-09-04 15:26 ` Jan Harkes
2001-09-04 15:24 ` Marcelo Tosatti
2001-09-04 17:14 ` Jan Harkes
2001-09-04 15:53 ` Marcelo Tosatti
2001-09-04 19:33 ` Daniel Phillips
2001-09-06 11:52 ` Rik van Riel
2001-09-06 12:31 ` Daniel Phillips
2001-09-06 12:32 ` Rik van Riel
2001-09-06 12:53 ` Daniel Phillips
2001-09-06 13:03 ` Rik van Riel
2001-09-06 13:18 ` Kurt Garloff
2001-09-06 13:23 ` Rik van Riel
2001-09-06 13:28 ` Alan Cox
2001-09-06 13:29 ` Rik van Riel
2001-09-06 16:45 ` Daniel Phillips
2001-09-06 16:57 ` Rik van Riel
2001-09-06 17:22 ` Daniel Phillips [this message]
2001-09-06 19:25 ` Rik van Riel
2001-09-06 19:45 ` Daniel Phillips
2001-09-06 19:52 ` Rik van Riel
2001-09-07 0:32 ` Kurt Garloff
2001-09-06 19:53 ` Mike Fedyk
2001-09-06 17:35 ` Mike Fedyk
2001-09-06 13:10 ` Stephan von Krawczynski
2001-09-06 13:23 ` Alex Bligh - linux-kernel
2001-09-06 13:54 ` M. Edward Borasky
2001-09-06 14:39 ` Alan Cox
2001-09-06 16:20 ` Victor Yodaiken
2001-09-06 17:33 ` Daniel Phillips
2001-09-06 13:42 ` Stephan von Krawczynski
2001-09-06 14:01 ` Alex Bligh - linux-kernel
2001-09-06 14:39 ` Stephan von Krawczynski
2001-09-06 15:02 ` Alex Bligh - linux-kernel
2001-09-06 15:07 ` Rik van Riel
[not found] ` <Pine.LNX.4.33L.0109061206020.31200-100000@imladris.rielhome.con ectiva>
2001-09-06 15:16 ` Alex Bligh - linux-kernel
2001-09-06 15:10 ` Stephan von Krawczynski
2001-09-06 15:18 ` Alex Bligh - linux-kernel
2001-09-06 17:34 ` Daniel Phillips
2001-09-06 17:32 ` Alex Bligh - linux-kernel
2001-09-06 17:51 ` Daniel Phillips
2001-09-06 21:01 ` [RFC] Defragmentation proposal: preventative maintenance and cleanup [LONG] Alex Bligh - linux-kernel
2001-09-07 6:35 ` Daniel Phillips
2001-09-07 8:58 ` Alex Bligh - linux-kernel
2001-09-07 9:15 ` Alex Bligh - linux-kernel
2001-09-07 9:28 ` Alex Bligh - linux-kernel
2001-09-07 21:38 ` Daniel Phillips
2001-09-07 21:56 ` Daniel Phillips
2001-09-07 12:30 ` page_launder() on 2.4.9/10 issue Stephan von Krawczynski
2001-09-04 16:27 ` Rik van Riel
2001-09-04 17:13 ` Jan Harkes
2001-09-04 15:56 ` Marcelo Tosatti
2001-09-04 17:54 ` Jan Harkes
2001-09-04 16:37 ` Marcelo Tosatti
2001-09-04 18:49 ` Alan Cox
2001-09-04 19:39 ` Jan Harkes
2001-09-04 20:25 ` Alan Cox
2001-09-06 11:23 ` Rik van Riel
2001-09-04 19:54 ` Andrea Arcangeli
2001-09-04 18:36 ` Marcelo Tosatti
2001-09-04 20:10 ` Daniel Phillips
2001-09-04 22:04 ` Andrea Arcangeli
2001-09-05 2:41 ` Daniel Phillips
2001-09-06 11:18 ` Rik van Riel
2001-09-04 17:35 ` Daniel Phillips
2001-09-04 20:43 ` Jan Harkes
2001-09-06 11:21 ` Rik van Riel
[not found] <20010828180108Z16193-32383+2058@humbolt.nl.linux.org.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.33.0108281110540.8754-100000@penguin.transmeta.com.suse.lists.linux.kernel>
2001-08-28 19:14 ` Andi Kleen
2001-08-29 13:48 ` Rik van Riel
2001-08-29 13:49 ` Linus Torvalds
2001-08-29 14:38 ` Rik van Riel
2001-08-28 20:01 ` David S. Miller
2001-08-28 20:49 ` Linus Torvalds
2001-08-28 20:56 ` David S. Miller
2001-09-27 23:14 Samium Gromoff
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