From: Jan Engelhardt <jengelh@linux01.gwdg.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Mark Lord <lkml@rtr.ca>, Ulrich Mueller <ulm@kph.uni-mainz.de>,
Herbert Poetzl <herbert@13thfloor.at>,
linux-kernel@vger.kernel.org, Jens Axboe <axboe@suse.de>,
Linus Torvalds <torvalds@osdl.org>,
Byron Stanoszek <gandalf@winds.org>, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH ] VMSPLIT config options (with default config fixed)
Date: Mon, 6 Feb 2006 15:56:34 +0100 (MET) [thread overview]
Message-ID: <Pine.LNX.4.61.0602061554550.31522@yvahk01.tjqt.qr> (raw)
In-Reply-To: <1139174355.3131.50.camel@laptopd505.fenrus.org>
>> >> What userspace programs do depend on it?
>> >
>> >there is a lot of userspace that assumes they can do 2Gb or even close
>> >to 3Gb of memory allocations. Databases, java, basically anything with
>> >threads. Sure for most of these its a configuration option to reduce
>> >this, but that still doesn't mean it's a good idea to change from the
>> >existing behavior...
>> >
>> Not to mention that these (almost(*)) fail anyway when you have less than 2
>> GB of RAM.
>
>it's not really overcommit... it can also be file mmaps or shared mmaps
>of say tmpfs files (the later is common with oracle actually)
>
So, just as I did in the sample patch, the manual split shall depend on
EMBEDDED. Those who run fat databases with big malloc/mmap assumptions
don't probably belong to the group using CONFIG_EMBEDDED.
Jan Engelhardt
--
next prev parent reply other threads:[~2006-02-06 14:56 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-10 12:58 2G memory split Jens Axboe
2006-01-10 13:29 ` Ingo Molnar
2006-01-10 13:37 ` Jens Axboe
2006-01-10 13:43 ` Byron Stanoszek
2006-01-10 13:47 ` Jens Axboe
2006-01-10 14:39 ` Jens Axboe
2006-01-10 14:44 ` Ingo Molnar
2006-01-10 15:03 ` [PATCH] Address space split configuration Jens Axboe
2006-01-10 15:11 ` Mark Lord
2006-01-10 15:24 ` Mikael Pettersson
2006-01-10 16:14 ` 2G memory split Linus Torvalds
2006-01-10 16:40 ` Mark Lord
2006-01-10 16:52 ` Linus Torvalds
2006-01-10 18:33 ` Coywolf Qi Hunt
2006-01-10 17:07 ` Mark Lord
2006-01-10 17:28 ` Linus Torvalds
2006-01-10 17:32 ` Jens Axboe
2006-01-10 17:37 ` Mark Lord
2006-01-10 18:58 ` Mark Lord
2006-01-10 19:16 ` [PATCH ] VMSPLIT config options (with default config fixed) Mark Lord
2006-01-10 17:37 ` Jeff V. Merkey
2006-01-10 19:27 ` Jens Axboe
2006-01-11 1:13 ` J.A. Magallon
2006-01-11 10:15 ` Jens Axboe
2006-01-11 16:00 ` Greg Norris
2006-01-11 17:13 ` Mark Lord
2006-01-11 17:44 ` Greg Norris
2006-02-05 18:42 ` Barry K. Nathan
2006-02-01 22:23 ` Herbert Poetzl
2006-02-02 11:04 ` Ulrich Mueller
2006-02-02 20:55 ` Jan Engelhardt
2006-02-03 22:39 ` Mark Lord
2006-02-04 10:23 ` Ulrich Mueller
2006-02-04 11:06 ` Jan Engelhardt
2006-02-04 10:36 ` Jens Axboe
2006-02-04 11:05 ` Jan Engelhardt
2006-02-04 13:57 ` Mark Lord
2006-02-05 15:32 ` J.A. Magallon
2006-02-05 15:38 ` Arjan van de Ven
2006-02-05 21:14 ` Jan Engelhardt
2006-02-05 21:19 ` Arjan van de Ven
2006-02-06 14:56 ` Jan Engelhardt [this message]
2006-02-07 0:41 ` Herbert Poetzl
2006-02-07 2:51 ` Mark Rustad
2006-02-07 9:38 ` Bernd Petrovitsch
2006-02-07 12:19 ` RFC: add an ADVANCED_USER option Adrian Bunk
2006-02-07 14:05 ` Ulrich Mueller
2006-02-07 14:42 ` Adrian Bunk
2006-02-09 16:06 ` Jan Engelhardt
2006-01-10 17:48 ` 2G memory split Bernd Eckenfels
2006-01-10 16:30 ` [PATCH] " Jeff V. Merkey
2006-01-10 18:50 ` Lennart Sorensen
2006-01-10 17:13 ` Jeff V. Merkey
2006-01-10 19:42 ` Jens Axboe
2006-01-10 20:17 ` Bernd Eckenfels
2006-01-10 20:28 ` Jens Axboe
2006-01-11 8:39 ` Bernd Eckenfels
2006-01-11 10:06 ` Jens Axboe
2006-01-10 18:14 ` Martin Bligh
2006-01-10 18:34 ` Linus Torvalds
2006-01-10 16:56 ` Jeff V. Merkey
2006-01-10 17:01 ` Jeff V. Merkey
2006-01-10 18:45 ` Mark Lord
2006-01-10 18:46 ` Martin Bligh
2006-01-10 18:58 ` Jens Axboe
2006-01-10 17:17 ` Jeff V. Merkey
2006-01-10 20:55 ` Alan Cox
2006-01-10 19:12 ` Jeff V. Merkey
2006-01-10 21:02 ` Jens Axboe
2006-01-10 19:30 ` Jeff V. Merkey
2006-01-10 18:39 ` Martin Bligh
2006-01-10 18:55 ` Dave Hansen
2006-01-10 19:01 ` Mark Lord
2006-01-10 19:05 ` Dave Hansen
2006-01-10 17:07 ` Sergey Vlasov
2006-04-10 14:11 ` Kirill Korotaev
2006-04-10 14:39 ` Mark Lord
2006-01-10 18:28 ` Coywolf Qi Hunt
2006-01-10 13:47 ` Mikael Pettersson
2006-01-10 13:54 ` Jens Axboe
2006-01-10 14:09 ` Gerd Hoffmann
2006-01-10 14:21 ` Jens Axboe
2006-01-10 14:25 ` Jens Axboe
2006-01-10 20:42 ` Jan Engelhardt
2006-01-11 0:25 ` Con Kolivas
2006-01-10 14:12 ` Mark Lord
2006-01-10 14:22 ` Jens Axboe
[not found] <5trTo-7aS-25@gated-at.bofh.it>
[not found] ` <5trTo-7aS-23@gated-at.bofh.it>
[not found] ` <5ts37-7nG-23@gated-at.bofh.it>
[not found] ` <5tsZ0-lL-3@gated-at.bofh.it>
[not found] ` <5tuor-2zh-63@gated-at.bofh.it>
[not found] ` <5tvaL-3MA-77@gated-at.bofh.it>
[not found] ` <5tvDG-4nl-47@gated-at.bofh.it>
[not found] ` <5tvDF-4nl-45@gated-at.bofh.it>
[not found] ` <5twTa-6cF-25@gated-at.bofh.it>
[not found] ` <5txcv-6OX-31@gated-at.bofh.it>
[not found] ` <5ByEo-3fj-7@gated-at.bofh.it>
[not found] ` <5BKvR-3gt-25@gated-at.bofh.it>
[not found] ` <5BTJ2-fP-3@gated-at.bofh.it>
[not found] ` <5ChUM-2f8-21@gated-at.bofh.it>
[not found] ` <5CtsV-1zF-3@gated-at.bofh.it>
2006-02-05 20:20 ` [PATCH ] VMSPLIT config options (with default config fixed) Bodo Eggert
2006-02-05 22:13 ` Jeff Dike
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