Can't See All Memory - CentOS 4.2

[technick]

I am in the process of setting up some servers, IBM X360 rack servers. They are decked out with 16 gigs of memory and quad xeon processors per system. CentOS is only seeing 8 gigs of the 16. I checked the BIOS, and the BIOS is reporting 16 gigs of ECC Registered memory correctly.

I did some research and saw IBM recommending I use the EL Hugemem kernel, so I went out and tried that. Still the same results. Here's the current kernel information.

[root@vs1 ~]# uname -a
Linux vs1.streamfire.net 2.6.9-34.ELhugemem #1 SMP Wed Mar 8 00:47:12 CST 2006 i686 i686 i386 GNU/Linux
[root@vs1 ~]# free
total used free shared buffers cached
Mem: 8032148 8012260 19888 0 9956 7730756
-/+ buffers/cache: 271548 7760600
Swap: 16386292 8 16386284
[root@vs1 ~]#

I was trying to advoid rebuilding the kernel, but I have a feeling I might have too.

Any advice / suggestions would be greatly appreciated.

Thanks in advance.

Nick

[technick]

I went ahead and compiled a new kernel based off of the current config with a few changes and still the same issue. I compiled 2.6.17 with the same results. I verified that largemem was available and it was set for 64 gigs of memory.

I need help guys......

I'll be patiently waiting...

[falko]

Have a look here: http://www.2cpu.com/forums/printthread.php?t=74951
http://lists.centos.org/pipermail/centos/2006-April/063467.html

Maybe the problem is that you use the 32-bit CentOS version instead of the 64-bit one.