Re: 128 GiB memory question-- kernel only sees 64GiB?

From: Justin Piszcz
Date: Tue Jul 22 2008 - 16:55:21 EST

On Tue, 22 Jul 2008, Peter Zijlstra wrote:

On Tue, 2008-07-22 at 10:21 -0400, Justin Piszcz wrote:

To be able to utilize 128 GiB of memory on a host, does one need to enable
NUMA support? Currently only 64 GiB is showing up.

As far as machine name/motherboard type, I do not have this information
currently but I am told there are one or two of these boxes are running
CentOS 5.x and/or RHEL5/AS.

Sounds like you need to bug RH with that ;-)

Is there something special you need to do to utilize all 128 GiB of

Does a recent kernel work for you? Also, you could at the very least
have mentioned your machine architecture; is it x86_64, ia64 or ppc64?

Sun X4600, will find out if they are running the right kernel and also check the BIOS, thanks.

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