From: Jeff Dike <jdike@karaya.com>
To: Jesse Pollard <pollard@tomcat.admin.navo.hpc.mil>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC] Arch option to touch newly allocated pages
Date: Wed, 06 Mar 2002 12:08:09 -0500 [thread overview]
Message-ID: <200203061708.MAA02691@ccure.karaya.com> (raw)
In-Reply-To: Your message of "Wed, 06 Mar 2002 10:03:57 CST." <200203061603.KAA21855@tomcat.admin.navo.hpc.mil>
pollard@tomcat.admin.navo.hpc.mil said:
> Currently the only way to ensure that the memory IS available is to
> modify every page at startup. Yes it will swap the modified pages.
Currently, yes.
But with Alan says his address space accounting will prevent mmaps from
succeeding if populating them would OOM the system, which gives you want
you want and which sounds like the right thing. The 8 64M UMLs will run
without needing to touch all their pages at bootup and without fear of being
killed later. If the 9th UML would be in danger of random death, then it
will never get off the ground.
Note that this doesn't help when the UMLs are under a smaller limit than
RAM + .5 * swap or whatever as happens when they are mmapping from tmpfs.
That's the situation that I'm concerned about.
Jeff
next prev parent reply other threads:[~2002-03-06 17:07 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-03 21:12 [RFC] Arch option to touch newly allocated pages Jeff Dike
2002-03-03 22:01 ` Alan Cox
2002-03-03 23:27 ` Jeff Dike
2002-03-03 23:48 ` Alan Cox
2002-03-04 3:16 ` Jeff Dike
2002-03-04 3:35 ` Alan Cox
2002-03-04 5:04 ` Jeff Dike
2002-03-04 15:09 ` Alan Cox
2002-03-04 17:42 ` Jeff Dike
2002-03-04 18:29 ` Alan Cox
2002-03-04 18:36 ` Jeff Dike
2002-03-04 18:49 ` Alan Cox
2002-03-04 20:46 ` Jeff Dike
2002-03-04 22:49 ` Alan Cox
2002-03-04 17:46 ` H. Peter Anvin
2002-03-04 18:34 ` Jeff Dike
2002-03-04 18:33 ` H. Peter Anvin
2002-03-04 20:36 ` Jeff Dike
2002-03-04 22:51 ` Alan Cox
2002-03-05 4:15 ` Jeff Dike
2002-03-05 4:28 ` Benjamin LaHaise
2002-03-05 4:40 ` Jeff Dike
2002-03-05 5:34 ` H. Peter Anvin
2002-03-05 14:43 ` Jeff Dike
2002-03-05 16:37 ` H. Peter Anvin
2002-03-05 16:56 ` Wayne Whitney
2002-03-05 18:12 ` Jeff Dike
2002-03-05 18:30 ` Benjamin LaHaise
2002-03-06 14:59 ` Daniel Phillips
2002-03-06 15:24 ` Benjamin LaHaise
2002-03-06 15:24 ` Daniel Phillips
2002-03-06 16:36 ` Benjamin LaHaise
2002-03-06 23:14 ` Daniel Phillips
2002-03-06 23:20 ` Benjamin LaHaise
2002-03-06 23:26 ` Daniel Phillips
2002-03-06 23:33 ` H. Peter Anvin
2002-03-07 0:08 ` Daniel Phillips
2002-03-07 1:27 ` Jeff Dike
2002-03-07 1:52 ` Benjamin LaHaise
2002-03-08 19:17 ` Jeff Dike
2002-03-08 21:22 ` Benjamin LaHaise
2002-03-07 13:49 ` Alan Cox
2002-03-07 13:36 ` Daniel Phillips
2002-03-07 14:04 ` yodaiken
2002-03-07 14:21 ` Daniel Phillips
2002-03-07 14:38 ` yodaiken
2002-03-07 15:31 ` Daniel Phillips
2002-03-07 16:50 ` yodaiken
2002-03-07 18:07 ` Daniel Phillips
2002-03-07 18:15 ` yodaiken
2002-03-07 19:22 ` Alan Cox
2002-03-07 22:43 ` David Woodhouse
2002-03-07 23:09 ` Alan Cox
2002-03-07 22:57 ` David Woodhouse
2002-03-07 14:43 ` Alan Cox
2002-03-07 15:32 ` Daniel Phillips
2002-03-07 16:19 ` Alan Cox
2002-03-07 17:54 ` Daniel Phillips
2002-03-07 15:34 ` Daniel Phillips
2002-03-07 19:18 ` Andrew Morton
2002-03-07 20:10 ` Rik van Riel
2002-03-07 20:56 ` Andrew Morton
2002-03-07 21:23 ` Rik van Riel
2002-03-07 22:02 ` Andrew Morton
2002-03-07 22:10 ` Rik van Riel
2002-03-07 22:23 ` Andrew Morton
2002-03-07 22:27 ` Rik van Riel
2002-03-07 22:41 ` Andrew Morton
2002-03-07 22:42 ` David Lang
2002-03-06 16:03 ` Jesse Pollard
2002-03-06 17:08 ` Jeff Dike [this message]
2002-03-06 17:33 ` Alan Cox
2002-03-07 0:28 ` Jeff Dike
2002-03-07 0:44 ` Alan Cox
2002-03-05 18:46 ` H. Peter Anvin
2002-03-06 1:30 ` Alan Cox
2002-03-06 10:49 ` David Woodhouse
2002-03-06 14:26 ` Jeff Dike
2002-03-06 16:50 ` Alan Cox
2002-03-06 20:25 ` Jeff Dike
2002-03-06 20:54 ` Alan Cox
2002-03-06 21:27 ` Malcolm Beattie
2002-03-06 23:26 ` Jeff Dike
2002-03-06 21:27 ` David Woodhouse
2002-03-06 22:25 ` Joseph Malicki
2002-03-07 0:04 ` Richard Gooch
2002-03-07 0:28 ` Jeff Dike
2002-03-07 0:44 ` Alan Cox
2002-03-06 22:21 ` Pavel Machek
2002-03-07 11:30 ` Dave Jones
2002-03-07 18:21 ` H. Peter Anvin
2002-03-05 14:43 ` Jeff Dike
2002-03-05 16:57 ` H. Peter Anvin
2002-03-05 18:14 ` Jeff Dike
2002-03-05 18:45 ` H. Peter Anvin
2002-03-05 17:30 ` Jan Harkes
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