From: "David S. Miller" <davem@redhat.com>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>, linux-kernel@vger.kernel.org
Subject: Re: page_launder() bug
Date: Tue, 8 May 2001 01:29:48 -0700 (PDT) [thread overview]
Message-ID: <15095.44668.842241.185318@pizda.ninka.net> (raw)
In-Reply-To: <Pine.LNX.4.21.0105080019420.15378-100000@penguin.transmeta.com>
In-Reply-To: <15095.38698.313444.486904@pizda.ninka.net> <Pine.LNX.4.21.0105080019420.15378-100000@penguin.transmeta.com>
Linus Torvalds writes:
> Maybe it's academic. Do we know that any of this actually makes any
> performance difference at all?
We know that dirty swap pages can accumulate to the point where the
swapper starves before it gets to enough of the "second pass" cases of
the page_launder loop to run in order to get rid of them.
That was the behavior I saw that let me to hacking up my broken patch.
Even simple "memory hog" test programs can trigger this behavior.
Just write a program which "grows almost completely into swap then
subsides" over and over again.
Later,
David S. Miller
davem@redhat.com
next prev parent reply other threads:[~2001-05-08 8:30 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-06 21:08 page_launder() bug BERECZ Szabolcs
2001-05-06 21:59 ` Jonathan Morton
2001-05-06 22:07 ` BERECZ Szabolcs
2001-05-07 4:55 ` David S. Miller
2001-05-07 5:19 ` Aaron Lehmann
2001-05-07 6:26 ` Tobias Ringstrom
2001-05-07 8:59 ` Helge Hafting
2001-05-07 19:02 ` J . A . Magallon
2001-05-08 7:52 ` Helge Hafting
2001-05-10 12:19 ` Ingo Oeser
2001-05-10 10:51 ` Anuradha Ratnaweera
2001-05-07 10:52 ` Alan Cox
2001-05-07 13:49 ` Daniel Phillips
2001-05-07 13:53 ` H. Peter Anvin
2001-05-07 8:54 ` David S. Miller
2001-05-07 15:12 ` Tobias Ringstrom
2001-05-07 14:52 ` Horst von Brand
[not found] ` <davem@redhat.com>
2001-11-21 7:16 ` [VM/MEMORY-SICKNESS] 2.4.15-pre7 kmem_cache_create invalid opcode Jeff V. Merkey
2001-11-21 6:22 ` David S. Miller
2001-11-21 6:47 ` David S. Miller
2001-11-21 6:54 ` Jeff Merkey
2001-11-21 6:56 ` David S. Miller
2001-11-21 7:03 ` Jeff Merkey
2001-11-21 7:49 ` arjan
2001-11-21 18:31 ` Jeff Merkey
2001-11-21 19:06 ` Doug Ledford
2001-11-21 19:51 ` Jeff Merkey
2001-11-21 19:58 ` J Sloan
2001-11-21 20:38 ` Doug Ledford
2001-11-21 21:17 ` Jeff Merkey
2001-11-21 19:16 ` Arjan van de Ven
2001-11-21 19:53 ` Jeff Merkey
2001-11-21 20:36 ` Doug Ledford
2001-11-21 21:16 ` Jeff Merkey
2001-11-21 21:28 ` Robert Love
2001-11-21 7:09 ` David S. Miller
2001-11-21 7:14 ` Jeff Merkey
2001-11-21 7:28 ` Stuart Young
2001-11-21 7:33 ` Jeff V. Merkey
2001-11-21 6:54 ` Chris Abbey
2001-11-21 7:05 ` Jeff Merkey
2001-11-21 6:47 ` Kai Henningsen
2001-11-21 18:28 ` Jeff Merkey
2001-11-21 8:49 ` Alan Cox
2001-11-21 18:28 ` Jeff Merkey
2001-05-08 17:59 ` page_launder() bug Kai Henningsen
2001-05-09 2:32 ` Rusty Russell
2001-05-09 8:43 ` Martin Dalecki
2001-05-09 3:36 ` Jonathan Morton
2001-05-07 17:59 ` Linus Torvalds
2001-05-07 21:22 ` Marcelo Tosatti
2001-05-07 23:23 ` Linus Torvalds
2001-05-07 21:50 ` Marcelo Tosatti
2001-05-07 23:52 ` Linus Torvalds
2001-05-07 22:26 ` Marcelo Tosatti
2001-05-08 2:29 ` Linus Torvalds
2001-05-13 16:08 ` Rik van Riel
2001-05-13 19:29 ` Linus Torvalds
2001-05-14 22:05 ` Marcelo Tosatti
2001-05-08 0:16 ` David S. Miller
2001-05-08 2:34 ` Linus Torvalds
2001-05-08 1:40 ` Marcelo Tosatti
2001-05-08 3:46 ` Linus Torvalds
2001-05-08 2:37 ` Marcelo Tosatti
2001-05-08 21:16 ` Marcelo Tosatti
2001-05-08 23:38 ` Linus Torvalds
2001-05-08 23:53 ` Marcelo Tosatti
2001-05-09 2:13 ` David S. Miller
2001-05-09 17:38 ` Marcelo Tosatti
2001-05-09 20:05 ` David S. Miller
2001-05-09 18:40 ` Marcelo Tosatti
2001-05-09 21:08 ` David S. Miller
2001-05-09 19:50 ` Marcelo Tosatti
2001-05-13 16:34 ` Rik van Riel
2001-05-13 19:34 ` Linus Torvalds
2001-05-13 19:39 ` Rik van Riel
2001-05-13 20:42 ` Linus Torvalds
2001-05-14 7:05 ` Kai Henningsen
2001-05-13 17:52 ` David S. Miller
2001-05-13 17:55 ` Rik van Riel
2001-05-13 18:00 ` David S. Miller
2001-05-08 6:50 ` David S. Miller
2001-05-08 7:40 ` Linus Torvalds
2001-05-08 18:53 ` Marcelo Tosatti
2001-05-08 8:29 ` David S. Miller [this message]
2001-05-08 3:22 ` David S. Miller
2001-05-08 3:26 ` Linus Torvalds
2001-05-08 2:47 ` David S. Miller
2001-05-08 1:34 ` Marcelo Tosatti
2001-05-08 3:18 ` David S. Miller
2001-05-08 1:47 ` Marcelo Tosatti
2001-05-08 3:24 ` Linus Torvalds
2001-05-08 3:29 ` David S. Miller
2001-05-08 10:36 ` BERECZ Szabolcs
2001-05-08 12:33 ` Mikulas Patocka
2001-05-13 16:24 ` Rik van Riel
2001-05-13 21:02 ` Another VM race? (was: page_launder() bug) Mikulas Patocka
2001-05-13 23:04 ` Rik van Riel
2001-05-14 9:53 ` Mikulas Patocka
2001-05-08 0:06 ` page_launder() bug David S. Miller
2001-05-07 23:31 ` David S. Miller
2001-05-07 22:44 ` David S. Miller
2001-05-08 1:00 ` Horst von Brand
2001-05-07 0:32 Jonathan Lundell
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