Re: AMD Athlon64 X2 Dual-core and 4GB

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To: [email protected]
Subject: Re: AMD Athlon64 X2 Dual-core and 4GB
From: Vladimir Lazarenko <[email protected]>
Date: Fri, 28 Oct 2005 18:40:36 +0200
Cc: "Eric W. Biederman" <[email protected]>, [email protected]
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]>
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Thus, the question - would I be able to use whole 4G RAM with dual-core amd and
kernel with SMP compiled for i686?



Why would you use a dual core AMD in 32 bit mode?  Just build an x86_64
kernel.

If you want to use 4GB in 32 bit mode, you *need* remapping (or you lose
part of your memory).  Remapping means you have MORE than 4 GB of physical
address, which means you need PAE to use it at all.


Because I find my distribution's 64-bit release reasonably unstable yet? :)

Or can I somehow build an x86_64 kernel and keep using 32-bit libc?

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