From: Timur Tabi <ttabi@interactivesi.com>
To: linux-kernel@vger.kernel.org
Subject: Re: What is the truth about Linux 2.4's RAM limitations?
Date: Tue, 10 Jul 2001 12:01:13 -0500 [thread overview]
Message-ID: <3B4B34D9.8090203@interactivesi.com> (raw)
In-Reply-To: <200107092129.QAA13628@tomcat.admin.navo.hpc.mil>
Jesse Pollard wrote:
>>So what are the limits without using PAE? Here I'm still having a little
>>problem finding definitive answers but ...
>>
>3 GB. Final answers are in the FAQ, and have been discussed before. You can
>also look in the Intel 80x86 CPU specifications.
>
>The only way to exceed current limits is via some form of segment register usage
>which will require a different compiler and a replacement of the memory
>architecture of x86 Linux implementation.
>
Are you talking about using 48-bit pointers?
(48-bit pointers, aka 16:32 pointers, on x86 are basically "far 32-bit
pointers". That is, each pointer is stored as a 48-bit value, where 16
bits are for the selector/segment, and 32 bits are for the offset.
--
Timur Tabi
Interactive Silicon
next prev parent reply other threads:[~2001-07-10 17:01 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-09 21:29 What is the truth about Linux 2.4's RAM limitations? Jesse Pollard
2001-07-10 17:01 ` Timur Tabi [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-07-11 4:31 alad
2001-07-10 21:49 Jesse Pollard
2001-07-10 22:07 ` Jonathan Lundell
2001-07-10 18:38 Jesse Pollard
2001-07-10 19:14 ` Mark H. Wood
2001-07-10 18:12 Jesse Pollard
2001-07-10 18:22 ` Jonathan Lundell
2001-07-10 18:28 ` Brian Gerst
2001-07-10 18:43 ` Chris Wedgwood
2001-07-10 19:35 ` Brian Gerst
[not found] <Pine.LNX.4.32.0107091250170.25061-100000@maus.spack.org.suse.lists.linux.kernel>
2001-07-09 21:03 ` Andi Kleen
2001-07-09 20:01 Adam Shand
2001-07-09 21:15 ` Brian Gerst
2001-07-09 21:18 ` Rik van Riel
2001-07-09 22:17 ` Matti Aarnio
2001-07-10 13:49 ` Chris Wedgwood
2001-07-10 17:03 ` Timur Tabi
2001-07-10 17:35 ` Richard B. Johnson
2001-07-10 18:01 ` Timur Tabi
2001-07-10 18:08 ` Jonathan Lundell
2001-07-10 18:45 ` Richard B. Johnson
2001-07-10 19:26 ` Jonathan Lundell
2001-07-10 23:56 ` Jesse Pollard
2001-07-10 20:19 ` Malcolm Beattie
2001-07-10 3:01 ` jlnance
2001-07-10 3:29 ` Michael Bacarella
2001-07-16 8:37 ` Ingo Oeser
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