Dual Opterons don't see all memory

[Matthew Seaman]

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Erich Dollansky wrote:

> Paul Schmehl wrote:
>> --On September 26, 2007 9:06:57 PM -0700 Eric Osterweil
>> <eoster at CS.UCLA.EDU> wrote:
>>
>>> On Sep 26, 2007, at 8:57 PM, Erich Dollansky wrote:
>>>
>>>> Eric Osterweil wrote:
>>>>
>>>>> make use of it's 6GB of memory, and FreeBSD can only see about 4GB
>>>>> of it.
>>>>> Can anyone help me figure out how to make use of the missing GB?
>>>>> FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007
>>>>
>>>> this looks like a 32 bit binary to me.
>>>>
>>>> You either need a 64 bit binary or you need to enable PAE.
>>>>
>>>> Just build a custom kernel for 64 bits.
>>>>
>>>
>>> Ahh... To do this, do I just specify the CPUTYPE in the /etc/make.conf
>>> as:
>>> CPUTYPE=amd64
>>> ?
>>>
>> No.  Add options SMP to GENERIC or use the SMP conf file that's
>> already there (and includes GENERIC).  Then recompile the kernel per
>> the handbook.
>>
> he still has to set the CPU type also in this config file to amd64.

If the OP has installed FreeBSD i386 then changing the CPU type in
/etc/make.conf won't magically get him FreeBSD amd64 --- it will just
get him FreeBSD i386 optimized for AMD processors running in 32bit
mode.

As far as I know, there is no simple way to start with a 32-bit
system and the FreeBSD sources and recompile and reinstall everything
into a 64-bit system.  (Although the opposite direction is apparently
possible on 7-CURRENT, but it's a guru-only level of difficulty.)

The best and most effective answer here is to start by downloading
an amd64 installation CD and redo the whole thing from scratch.

	Cheers,

	Matthew

- -- 
Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
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PGP: http://www.infracaninophile.co.uk/pgpkey     Ramsgate
                                                  Kent, CT11 9PW
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