From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: i686 SMP systems with more then 12 GB ram with 2.4.x kernel ?
Date: 1 Jan 2002 17:16:18 -0800 [thread overview]
Message-ID: <a0tn12$ec8$1@cesium.transmeta.com> (raw)
In-Reply-To: <HBEHIIBBKKNOBLMPKCBBMEAHEFAA.znmeb@aracnet.com> <E16LTvs-00016I-00@the-village.bc.nu>
Followup to: <E16LTvs-00016I-00@the-village.bc.nu>
By author: Alan Cox <alan@lxorguk.ukuu.org.uk>
In newsgroup: linux.dev.kernel
>
> > 2. Isn't the boundary at 2^30 really irrelevant and the three "correct"
> > zones are (0 - 2^24-1), (2^24 - 2^32-1) and (2^32 - 2^36-1)?
>
> Nope. The limit for directly mapped memory is 2^30.
>
2^30-2^27 to be exact (assuming a 3:1 split and 128MB vmalloc zone.)
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2002-01-02 1:17 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-29 18:18 i686 SMP systems with more then 12 GB ram with 2.4.x kernel ? Harald Holzer
2001-12-29 18:45 ` Alan Cox
2001-12-29 21:24 ` M. Edward (Ed) Borasky
2001-12-30 0:25 ` M. Edward (Ed) Borasky
2001-12-30 2:14 ` Harald Holzer
2001-12-30 2:33 ` M. Edward Borasky
2002-01-01 18:15 ` M. Edward Borasky
2002-01-01 18:46 ` Alan Cox
2002-01-01 19:02 ` M. Edward Borasky
2002-01-02 1:16 ` H. Peter Anvin [this message]
2002-01-02 21:17 ` Gerrit Huizenga
2002-01-06 8:20 ` Benjamin LaHaise
2002-01-06 16:16 ` Alan Cox
2002-01-06 20:23 ` Benjamin LaHaise
2002-01-06 23:37 ` Chris Wedgwood
2002-01-07 0:29 ` The COUGAR Project M. Edward Borasky
2002-01-07 2:18 ` i686 SMP systems with more then 12 GB ram with 2.4.x kernel ? Marvin Justice
2002-01-07 2:38 ` Chris Wedgwood
2002-01-07 4:40 ` T. A.
2002-01-07 16:20 ` Hugh Dickins
2002-01-02 17:30 ` Timothy D. Witham
[not found] ` <1009994687.12942.14.camel@hh2.hhhome.at>
[not found] ` <1009995669.1253.17.camel@wookie-laptop.pdx.osdl.net>
2002-01-02 23:50 ` Harald Holzer
2002-01-03 0:16 ` Alan Cox
2002-01-03 13:30 ` Rik van Riel
2002-01-04 12:09 ` Hugh Dickins
2002-01-04 12:15 ` Rik van Riel
2002-01-03 0:17 ` Mark Zealey
2002-01-03 13:28 ` Rik van Riel
2002-01-03 14:33 ` Stephan von Krawczynski
2002-01-03 16:38 ` Rik van Riel
2002-01-03 15:15 ` Anton Blanchard
-- strict thread matches above, loose matches on Subject: below --
2001-12-29 19:25 Dieter Nützel
2002-01-06 18:39 Daniel Freedman
2002-01-06 18:59 ` Marvin Justice
2002-01-06 19:45 ` Daniel Freedman
2002-01-06 20:15 ` Marvin Justice
2002-01-07 5:17 ` Daniel Freedman
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