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From: "Stephen C. Tweedie" <sct@redhat.com>
To: "Dr. Werner Fink" <werner@suse.de>
Cc: "Stephen C. Tweedie" <sct@redhat.com>,
	Andrea Arcangeli <andrea@e-mind.com>,
	Rik van Riel <riel@humbolt.geo.uu.nl>,
	Zlatko Calusic <Zlatko.Calusic@CARNet.hr>,
	Linus Torvalds <torvalds@transmeta.com>,
	"Eric W. Biederman" <ebiederm+eric@ccr.net>,
	Savochkin Andrey Vladimirovich <saw@msu.ru>,
	steve@netplus.net, brent verner <damonbrent@earthlink.net>,
	"Garst R. Reese" <reese@isn.net>,
	Kalle Andersson <kalle.andersson@mbox303.swipnet.se>,
	Ben McCann <bmccann@indusriver.com>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>,
	bredelin@ucsd.edu, linux-kernel@vger.rutgers.edu,
	linux-mm@kvack.org
Subject: Re: MM deadlock [was: Re: arca-vm-8...]
Date: Thu, 21 Jan 1999 16:50:36 GMT	[thread overview]
Message-ID: <199901211650.QAA04674@dax.scot.redhat.com> (raw)
In-Reply-To: <19990114155321.C573@Galois.suse.de>

Hi,

On Thu, 14 Jan 1999 15:53:21 +0100, "Dr. Werner Fink" <werner@suse.de> said:

>> There is no aging on the page cache at all other than the PG_referenced
>> bit.

> I know that most of you do not like aging.  Nevertheless, on high stressed
> systems with less than 128M you will see a critical point whereas the page
> cache and readahead does not avoid that swapin I/O time needed by a program
> increases to similar size of the average program time slice.

There's no reason why timeslices should have anything to do with swapin
IO time; we do not count time spent waiting for IO against the process's
allocated timeslice.

> What's about a simple aging of program page cluster or better of the
> page cache?  Increasing the age could be done if and only if the pages
> or page clusters swapped in and the program wasn't able to use its
> time slice. Decreasing the age could be placed in shrink_mmap().

Page aging dramatically increases the amount of CPU time we spend
looking for free pages.  The selection of which pages to swap out really
shouldn't have anything to do with scheduling of CPU-bound processes
(which is the only time where timeslices actually count for anything).

--Stephen
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  reply	other threads:[~1999-01-21 16:51 UTC|newest]

Thread overview: 243+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <199812290146.BAA12687@terrorserver.swansea.linux.org.uk>
1998-12-31 18:00 ` 2.2.0 Bug summary Andrea Arcangeli
1998-12-31 18:34   ` [patch] new-vm improvement [Re: 2.2.0 Bug summary] Andrea Arcangeli
1999-01-01  0:16     ` Steve Bergman
1999-01-01 17:16       ` Andrea Arcangeli
1999-01-01 16:44     ` Andrea Arcangeli
1999-01-01 20:02       ` Andrea Arcangeli
1999-01-01 23:46         ` Steve Bergman
1999-01-02  6:55           ` Linus Torvalds
1999-01-02  8:33             ` Steve Bergman
1999-01-02 14:48             ` Andrea Arcangeli
1999-01-02 15:38             ` Andrea Arcangeli
1999-01-02 18:10               ` Linus Torvalds
1999-01-02 20:52               ` Andrea Arcangeli
1999-01-03  2:59                 ` Andrea Arcangeli
1999-01-04 18:08                   ` [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm improvement , [Re: 2.2.0 Bug summary]] Andrea Arcangeli
1999-01-04 20:56                     ` Linus Torvalds
1999-01-04 21:10                       ` Rik van Riel
1999-01-04 22:04                       ` Alan Cox
1999-01-04 21:55                         ` Linus Torvalds
1999-01-04 22:51                           ` Andrea Arcangeli
1999-01-05  0:32                             ` Andrea Arcangeli
1999-01-05  0:52                               ` Zlatko Calusic
1999-01-05  3:02                               ` Zlatko Calusic
1999-01-05 11:49                                 ` Andrea Arcangeli
1999-01-05 13:23                                   ` Zlatko Calusic
1999-01-05 15:42                                     ` Andrea Arcangeli
1999-01-05 16:16                                       ` Zlatko Calusic
1999-01-05 15:35                               ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Andrea Arcangeli
1999-01-06 14:48                                 ` Andrea Arcangeli
1999-01-06 23:31                                   ` Andrea Arcangeli
1999-01-07  3:32                                     ` Results: 2.2.0-pre5 vs arcavm10 vs arcavm9 vs arcavm7 Steve Bergman
1999-01-07 12:02                                       ` Andrea Arcangeli
1999-01-07 20:27                                         ` Linus Torvalds
1999-01-07 23:56                                           ` Andrea Arcangeli
1999-01-07 17:35                                       ` Linus Torvalds
1999-01-07 18:44                                         ` Zlatko Calusic
1999-01-07 19:33                                           ` Linus Torvalds
1999-01-07 21:10                                             ` Zlatko Calusic
1999-01-07 19:38                                           ` Zlatko Calusic
1999-01-07 19:40                                           ` Andrea Arcangeli
1999-01-09  6:28                                           ` 2.2.0-pre[56] swap performance poor with > 1 thrashing task Dax Kelson
1999-01-09  6:32                                             ` Zlatko Calusic
1999-01-09  6:44                                               ` Linus Torvalds
1999-01-09 18:58                                                 ` Andrea Arcangeli
1999-01-11  9:21                                                 ` Buffer handling (setting PG_referenced on access) Zlatko Calusic
1999-01-11 17:44                                                   ` Linus Torvalds
1999-01-11 20:14                                                     ` Zlatko Calusic
1999-01-16 17:35                                                 ` 2.2.0-pre[56] swap performance poor with > 1 thrashing task Andrea Arcangeli
1999-01-09  7:48                                             ` Benjamin Redelings I
1999-01-09  6:53                                               ` Linus Torvalds
1999-01-09 22:39                                       ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Steve Bergman
1999-01-10  0:28                                         ` Steve Bergman
1999-01-10  5:35                                           ` Linus Torvalds
1999-01-10 18:33                                             ` Andrea Arcangeli
1999-01-10 18:43                                             ` Steve Bergman
1999-01-10 19:08                                               ` Linus Torvalds
1999-01-10 19:23                                                 ` Vladimir Dergachev
1999-01-10 20:09                                                 ` Andrea Arcangeli
1999-01-10 20:29                                                 ` Steve Bergman
1999-01-10 21:41                                                   ` Linus Torvalds
1999-01-10 23:33                                                     ` testing/pre-7 and do_poll() Chip Salzenberg
1999-01-11  6:02                                                       ` Linus Torvalds
1999-01-11  6:26                                                         ` Chip Salzenberg
1999-01-11  6:46                                                           ` Linus Torvalds
1999-01-11  6:59                                                             ` Chip Salzenberg
1999-01-11  7:02                                                               ` Linus Torvalds
1999-01-11 22:08                                                                 ` Shawn Leas
1999-01-11 22:13                                                                   ` Linus Torvalds
1999-01-12  0:25                                                                     ` estafford
1999-01-12  8:25                                                                       ` Shawn Leas
1999-01-12  7:06                                                                     ` Gregory Maxwell
1999-01-11 20:20                                                       ` Adam Heath
1999-01-11 16:57                                                   ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Steve Bergman
1999-01-11 19:36                                                     ` Andrea Arcangeli
1999-01-11 23:03                                                       ` Andrea Arcangeli
1999-01-11 23:38                                                         ` Zlatko Calusic
1999-01-12  2:02                                                         ` Steve Bergman
1999-01-12  3:21                                                           ` Results: Zlatko's new vm patch Steve Bergman
1999-01-12  5:33                                                             ` Linus Torvalds
1999-01-12 14:49                                                               ` Andrea Arcangeli
1999-01-12 16:58                                                               ` Joseph Anthony
1999-01-12 18:16                                                                 ` Stephen C. Tweedie
1999-01-12 20:15                                                                   ` Michael K Vance
1999-01-13 19:25                                                                     ` Stephen C. Tweedie
1999-01-12 18:24                                                               ` Michael K Vance
1999-01-13  0:01                                                               ` Where to find pre7. Was: " Robert Thorncrantz
1999-01-13 20:47                                                             ` [patch] arca-vm-19 [Re: Results: Zlatko's new vm patch] Andrea Arcangeli
1999-01-14 12:30                                                               ` Andrea Arcangeli
1999-01-15 23:56                                                                 ` [patch] NEW: arca-vm-21, swapout via shrink_mmap using PG_dirty Andrea Arcangeli
1999-01-16 16:49                                                                   ` Andrea Arcangeli
1999-01-17 23:47                                                                     ` Andrea Arcangeli
1999-01-18  5:11                                                                       ` Linus Torvalds
1999-01-18  7:28                                                                         ` Eric W. Biederman
1999-01-18 10:00                                                                           ` Andrea Arcangeli
1999-01-18  9:15                                                                         ` Andrea Arcangeli
1999-01-18 17:49                                                                           ` Linus Torvalds
1999-01-18 19:22                                                                       ` Andrea Arcangeli
1999-01-10 20:40                                               ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Andrea Arcangeli
1999-01-10 20:50                                                 ` Linus Torvalds
1999-01-10 21:01                                                   ` Andrea Arcangeli
1999-01-10 21:51                                                     ` Steve Bergman
1999-01-10 22:50                                                       ` Results: arcavm15, et. al Steve Bergman
1999-01-11  0:20                                                         ` Steve Bergman
1999-01-11 13:21                                                         ` Andrea Arcangeli
1999-01-11  3:47                                         ` Results: pre6 vs pre6+zlatko's_patch vs pre5 vs arcavm13 Gregory Maxwell
1999-01-06 23:35                                   ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Linus Torvalds
1999-01-07  4:30                                     ` Eric W. Biederman
1999-01-07 17:56                                       ` Linus Torvalds
1999-01-07 18:18                                         ` Rik van Riel
1999-01-07 19:19                                           ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] Alan Cox
1999-01-07 18:55                                         ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Zlatko Calusic
1999-01-07 22:57                                         ` Linus Torvalds
1999-01-08  1:16                                           ` Linus Torvalds
1999-01-08 10:45                                             ` Andrea Arcangeli
1999-01-08 19:06                                               ` Linus Torvalds
1999-01-09  9:43                                           ` MM deadlock [was: Re: arca-vm-8...] Savochkin Andrey Vladimirovich
1999-01-09 18:00                                             ` Linus Torvalds
1999-01-09 18:41                                               ` Andrea Arcangeli
1999-01-10 21:41                                                 ` Stephen C. Tweedie
1999-01-10 21:47                                                   ` Linus Torvalds
1999-01-09 21:50                                               ` Linus Torvalds
1999-01-10 11:56                                                 ` Savochkin Andrey Vladimirovich
1999-01-10 17:59                                                   ` Andrea Arcangeli
1999-01-10 22:33                                                   ` Stephen C. Tweedie
1999-01-10 16:59                                                 ` Stephen C. Tweedie
1999-01-10 18:13                                                   ` Andrea Arcangeli
1999-01-10 18:35                                                   ` Linus Torvalds
1999-01-10 19:45                                                     ` Alan Cox
1999-01-10 19:03                                                       ` Andrea Arcangeli
1999-01-10 21:39                                                         ` Stephen C. Tweedie
1999-01-10 19:09                                                       ` Linus Torvalds
1999-01-10 20:33                                                         ` Alan Cox
1999-01-10 20:07                                                           ` Linus Torvalds
1999-01-10 22:18                                                     ` Stephen C. Tweedie
1999-01-10 22:49                                                     ` Stephen C. Tweedie
1999-01-11  6:04                                                       ` Eric W. Biederman
1999-01-12 16:06                                                         ` Stephen C. Tweedie
1999-01-12 17:54                                                           ` Linus Torvalds
1999-01-12 18:44                                                             ` Zlatko Calusic
1999-01-12 19:05                                                               ` Andrea Arcangeli
1999-01-13 17:48                                                                 ` Stephen C. Tweedie
1999-01-13 18:07                                                                   ` 2.2.0-pre6 ain't nice =( Kalle Andersson
1999-01-13 19:05                                                                   ` MM deadlock [was: Re: arca-vm-8...] Alan Cox
1999-01-13 19:23                                                                     ` MOLNAR Ingo
1999-01-13 19:26                                                                     ` Andrea Arcangeli
1999-01-14 11:02                                                                       ` Mike Jagdis
1999-01-14 22:38                                                                         ` Andrea Arcangeli
1999-01-15  7:40                                                                       ` Agus Budy Wuysang
1999-01-14 10:48                                                                   ` Mike Jagdis
1999-01-12 21:46                                                               ` Rik van Riel
1999-01-13  6:52                                                                 ` Zlatko Calusic
1999-01-13 13:45                                                                 ` Andrea Arcangeli
1999-01-13 13:58                                                                   ` Chris Evans
1999-01-13 15:07                                                                     ` Andrea Arcangeli
1999-01-13 22:11                                                                       ` Stephen C. Tweedie
1999-01-13 14:59                                                                   ` Rik van Riel
1999-01-13 18:10                                                                     ` Andrea Arcangeli
1999-01-13 22:14                                                                       ` Stephen C. Tweedie
1999-01-14 14:53                                                                         ` Dr. Werner Fink
1999-01-21 16:50                                                                           ` Stephen C. Tweedie [this message]
1999-01-21 19:53                                                                             ` Andrea Arcangeli
1999-01-22 13:55                                                                               ` Stephen C. Tweedie
1999-01-22 19:45                                                                                 ` Andrea Arcangeli
1999-01-23 23:20                                                                             ` Alan Cox
1999-01-24  0:19                                                                               ` Linus Torvalds
1999-01-24 18:33                                                                                 ` Gregory Maxwell
1999-01-25  0:21                                                                                   ` Linus Torvalds
1999-01-25  1:28                                                                                     ` Alan Cox
1999-01-25  3:35                                                                                       ` pmonta
1999-01-25  4:17                                                                                       ` Linus Torvalds
1999-01-24 20:33                                                                                 ` Alan Cox
1999-01-25  0:27                                                                                   ` Linus Torvalds
1999-01-25  1:38                                                                                     ` Alan Cox
1999-01-25  1:04                                                                                       ` Andrea Arcangeli
1999-01-25  2:10                                                                                         ` Alan Cox
1999-01-25  3:16                                                                                           ` Garst R. Reese
1999-01-25 10:49                                                                                             ` Alan Cox
1999-01-25 14:06                                                                                           ` Rik van Riel
1999-01-25 21:59                                                                                       ` Gerard Roudier
1999-01-26 11:45                                                                                         ` Thomas Sailer
1999-01-26 20:48                                                                                           ` Gerard Roudier
1999-01-26 21:24                                                                                             ` Thomas Sailer
1999-01-27  0:25                                                                                             ` David Lang
1999-01-27 16:05                                                                                             ` Stephen C. Tweedie
1999-01-27 20:11                                                                                               ` Gerard Roudier
1999-01-26 13:06                                                                                         ` Stephen C. Tweedie
1999-01-26 14:28                                                                                           ` Alan Cox
1999-01-26 14:15                                                                                             ` MOLNAR Ingo
1999-01-26 14:36                                                                                               ` yodaiken
1999-01-26 15:21                                                                                                 ` MOLNAR Ingo
1999-01-27 10:31                                                                                                   ` yodaiken
1999-01-26 15:46                                                                                                 ` Alan Cox
1999-01-26 16:45                                                                                                   ` Stephen C. Tweedie
1999-01-30  7:01                                                                                                     ` yodaiken
1999-02-01 13:07                                                                                                       ` Stephen C. Tweedie
1999-01-26 16:37                                                                                               ` Stephen C. Tweedie
1999-01-27 11:35                                                                                               ` Jakub Jelinek
1999-01-26 14:21                                                                                             ` Rik van Riel
1999-01-25 16:25                                                                                 ` Stephen C. Tweedie
1999-01-25 16:52                                                                                   ` Andrea Arcangeli
1999-01-25 18:27                                                                                   ` Linus Torvalds
1999-01-25 18:43                                                                                     ` Stephen C. Tweedie
1999-01-25 18:49                                                                                       ` Linus Torvalds
1999-01-25 18:43                                                                                   ` Linus Torvalds
1999-01-25 19:15                                                                                     ` Stephen C. Tweedie
1999-01-26  1:57                                                                                   ` Andrea Arcangeli
1999-01-26 18:37                                                                                     ` Andrea Arcangeli
1999-01-27 12:13                                                                                     ` Stephen C. Tweedie
1999-01-22 16:29                                                                           ` Eric W. Biederman
1999-01-25 13:14                                                                             ` Dr. Werner Fink
1999-01-25 17:56                                                                               ` Stephen C. Tweedie
1999-01-25 19:10                                                                               ` Andrea Arcangeli
1999-01-25 20:49                                                                                 ` Dr. Werner Fink
1999-01-25 20:56                                                                                   ` Linus Torvalds
1999-01-26 12:23                                                                                     ` Rik van Riel
1999-01-26 15:44                                                                                       ` Andrea Arcangeli
1999-01-27 14:52                                                                                   ` Stephen C. Tweedie
1999-01-28 19:12                                                                                     ` Dr. Werner Fink
1999-01-13 17:55                                                                   ` [PATCH] " Stephen C. Tweedie
1999-01-13 18:52                                                                     ` Andrea Arcangeli
1999-01-13 22:10                                                                       ` Stephen C. Tweedie
1999-01-13 22:30                                                                         ` Linus Torvalds
1999-01-11 11:20                                                       ` Pavel Machek
1999-01-11 17:35                                                         ` Stephen C. Tweedie
1999-01-11 14:11                                                     ` Savochkin Andrey Vladimirovich
1999-01-11 17:55                                                       ` Linus Torvalds
1999-01-11 18:37                                                         ` Andrea Arcangeli
1999-01-08  2:56                                         ` arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]] Eric W. Biederman
1999-01-09  0:50                                         ` David S. Miller
1999-01-09  2:13                                         ` Stephen C. Tweedie
1999-01-09  2:34                                           ` Andrea Arcangeli
1999-01-09  9:30                                             ` Stephen C. Tweedie
1999-01-09 12:11                                           ` Andrea Arcangeli
1999-01-07 14:11                                     ` Andrea Arcangeli
1999-01-07 18:19                                       ` Linus Torvalds
1999-01-07 20:35                                         ` Andrea Arcangeli
1999-01-07 23:51                                           ` Linus Torvalds
1999-01-08  0:04                                             ` Andrea Arcangeli
1999-01-04 22:43                         ` [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm improvement , [Re: 2.2.0 Bug summary]] Andrea Arcangeli
1999-01-04 22:29                       ` Andrea Arcangeli
1999-01-05 13:33                   ` [patch] new-vm improvement [Re: 2.2.0 Bug summary] Ben McCann
1999-01-02 20:04             ` Steve Bergman
1999-01-02  3:03         ` Andrea Arcangeli

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