64-bit LFS

Andy Neebel aneebel at gmail.com
Fri Apr 1 13:38:39 PST 2005

On Mar 31, 2005 10:25 PM, Bruce Dubbs <bdubbs at swbell.net> wrote:
> I just got a new system for testing LFS builds.  It is a Intel 3.2GHz P4
> system with "EM64T" technology.  It came with RH Enterprise 3.0 "for
> AMD64 and EM64T" preinstalled.
> I'm not really sure what the EM64T technology does, except Googling
> around seems to indicate that there is something about allowing more
> than 4G memory (32 address bits?).  uname -a gives:
> Linux lfs5 2.4.21-15.EL #1 SMP Thu Apr 22 00:09:47 EDT 2004 x86_64
> x86_64 x86_64 GNU/Linux
> Has anyone looked at this type of system for LFS?  Since the RH version
> has a 2.4.21 kernel, I intend to use the LFS CD which does boot just fine.
> Any suggestions or comments will be appreciated.
>    -- Bruce
> --
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EM64T is Intel's version of AMD's AMD64/x86_64 system.  They are
compatible with each other (for the most part at least).  I think that
the Intel chips don't have as much of a 64 bit instruction set, but
mostly just have the ability to handle more memory.  I may be wrong
though.  Anyways, for LFS you can either use x86, which should run
fine, or the x86_64/AMD64 info that has been popping up should work as
well if you want to build a 64bit system.

As far as kernel goes, I think there are some improvements for this
chip in 2.6 kernels over what 2.4 contains.  Again, I'm mostly
guessing off of what I recall from a long time ago.


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