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Date: Fri, 2 Dec 2005 18:15:25 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: Mike Barnard <mike@bleeding-head.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: PAE not recognizing all RAM
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On Fri, Dec 02, 2005 at 05:57:27PM -0500, Mike Barnard wrote:
>    Hi, all. I have a fairly beefy server (Dell PowerEdge 8450,=20
> 8-processor 700 Mhz Xeon, 32GB RAM) I'm testing with FreeBSD. I got a=20
> 6.0-RELEASE kernel compiled with both SMP and PAE (the only catch was=20
> that the hptmv driver breaks the compile with SMP, but that's OK as I=20
> don't need it), but for some reason the kernel is only seeing 3.5G of=20
> RAM or thereabouts, judging from what I see in dmesg anyway:
>=20
> CPU: Intel Pentium III Xeon (700.07-MHz 686-class CPU)
>  Origin =3D "GenuineIntel"  Id =3D 0x6a1  Stepping =3D 1
> =20
> Features=3D0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE=
,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
> real memory  =3D 3758096384 (3584 MB)
> avail memory =3D 3676594176 (3506 MB)
> FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs
>=20
>    The memory line displayed in "top" reflects similar values. Is there=
=20
> some magic I need to do to make it see all the RAM?

No, it should just work if you have the kernel configured correctly.
At a guess you didn't actually enable PAE: please post your kernel
config file so we can check.

Kris

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