From: Rik van Riel <riel@redhat.com>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-kernel@vger.kernel.org, Alan Piszcz <ap@solarrain.com>
Subject: Re: 128 GiB memory question-- kernel only sees 64GiB?
Date: Tue, 22 Jul 2008 10:43:27 -0400 [thread overview]
Message-ID: <20080722104327.30cee9be@bree.surriel.com> (raw)
In-Reply-To: <alpine.DEB.1.10.0807221019570.8455@p34.internal.lan>
On Tue, 22 Jul 2008 10:21:44 -0400 (EDT)
Justin Piszcz <jpiszcz@lucidpixels.com> 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.
How much memory does the BIOS say the system has?
Can you get the e820 memory map (from early boot up) of the systems?
> 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.
Hopefully not with 64GB each :))
> Is there something special you need to do to utilize all 128 GiB of
> memory?
You need to use a 64 bit kernel, for one.
--
All rights reversed.
next prev parent reply other threads:[~2008-07-22 14:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-22 14:21 128 GiB memory question-- kernel only sees 64GiB? Justin Piszcz
2008-07-22 14:28 ` Peter Zijlstra
2008-07-22 20:55 ` Justin Piszcz
2008-07-23 8:21 ` Yinghai Lu
2008-07-22 14:43 ` Rik van Riel [this message]
2008-07-22 20:55 ` Justin Piszcz
2008-07-22 21:14 ` Rik van Riel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080722104327.30cee9be@bree.surriel.com \
--to=riel@redhat.com \
--cc=ap@solarrain.com \
--cc=jpiszcz@lucidpixels.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.