From: Timothy Miller <miller@techsource.com>
To: Stephan von Krawczynski <skraw@ithnet.com>
Cc: Marcelo Tosatti <marcelo.tosatti@cyclades.com.br>,
neilb@cse.unsw.edu.au, linux-kernel@vger.kernel.org
Subject: Re: experiences beyond 4 GB RAM with 2.4.22
Date: Tue, 16 Sep 2003 11:22:02 -0400 [thread overview]
Message-ID: <3F672A9A.9060809@techsource.com> (raw)
In-Reply-To: 20030916153658.3081af6c.skraw@ithnet.com
Stephan von Krawczynski wrote:
> On Tue, 16 Sep 2003 10:11:49 -0300 (BRT)
> Marcelo Tosatti <marcelo.tosatti@cyclades.com.br> wrote:
>
>
>>Oh... Jens just pointed bounce buffering is needed for the upper 2Gs.
>>
>>Maybe you have a SCSI card+disks to test ? 8)
>
>
> Well, I do understand the bounce buffer problem, but honestly the current way
> of handling the situation seems questionable at least. If you ever tried such a
> system you notice it is a lot worse than just dumping the additional ram above
> 4GB. You can really watch your network connections go bogus which is just
> unacceptable. Is there any thinkable way to ommit the bounce buffers and still
> do something useful with the beyond-4GB ram parts?
> We should not leave the current bad situation as is...
If there were some kind of tracking to determine which processes are
doing I/O which requires the process to be in low memory. Then,
processes can be migrated around in physical memory so as to optimize
for that.
Or is that already being done?
next prev parent reply other threads:[~2003-09-16 15:21 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-09 9:01 experiences beyond 4 GB RAM with 2.4.22 Stephan von Krawczynski
2003-09-09 12:25 ` Andrea Arcangeli
2003-09-12 2:46 ` Neil Brown
2003-09-12 6:54 ` Stephan von Krawczynski
2003-09-12 7:11 ` Jens Axboe
2003-09-12 7:53 ` Mike Fedyk
2003-09-15 22:01 ` Marcelo Tosatti
2003-09-16 8:21 ` Stephan von Krawczynski
2003-09-16 12:05 ` Stephan von Krawczynski
2003-09-16 13:11 ` Marcelo Tosatti
2003-09-16 13:36 ` Stephan von Krawczynski
2003-09-16 13:55 ` Richard B. Johnson
2003-09-16 14:13 ` Stephan von Krawczynski
2003-09-16 14:33 ` Marcelo Tosatti
2003-09-16 14:36 ` Stephan von Krawczynski
2003-09-16 14:36 ` Alan Cox
2003-09-16 15:20 ` Stephan von Krawczynski
2003-09-16 15:29 ` Alan Cox
2003-09-16 15:49 ` Timothy Miller
2003-09-16 16:17 ` Stephan von Krawczynski
2003-09-16 19:58 ` Olivier Galibert
2003-09-17 15:10 ` Alan Cox
2003-09-17 19:19 ` Jens Axboe
2003-09-17 19:30 ` Marcelo Tosatti
2003-09-17 22:18 ` Stephan von Krawczynski
2003-09-18 7:08 ` Jens Axboe
2003-09-18 7:12 ` Jens Axboe
2003-09-18 11:22 ` Stephan von Krawczynski
2003-09-18 15:05 ` William Lee Irwin III
2003-09-16 17:10 ` Pavel Machek
2003-09-16 19:53 ` Olivier Galibert
2003-09-16 20:04 ` Pavel Machek
2003-09-16 21:16 ` Marcelo Tosatti
2003-09-16 21:23 ` Olivier Galibert
2003-09-17 11:14 ` Stephan von Krawczynski
2003-09-17 13:08 ` Olivier Galibert
2003-09-18 9:58 ` Olivier Galibert
2003-09-18 10:13 ` Stephan von Krawczynski
2003-09-18 11:22 ` Olivier Galibert
2003-09-17 6:41 ` Rogier Wolff
2003-09-17 10:26 ` Jens Axboe
2003-09-17 10:42 ` Rogier Wolff
2003-09-17 10:53 ` Jens Axboe
2003-09-17 19:19 ` Pavel Machek
2003-09-18 11:39 ` Rogier Wolff
2003-09-18 12:13 ` Rogier Wolff
2003-09-16 15:22 ` Timothy Miller [this message]
2003-09-16 15:29 ` Martin J. Bligh
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