_____ From: Ed Greshko [mailto:[email protected]] To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list [mailto:[email protected]] Sent: Tue, 30 Dec 2008 22:10:36 -0800 Subject: Re: [rhelv5-list] 4 GB not recognized after PAE kernel upgrade
Stephen John Smoogen wrote: > On Tue, Dec 30, 2008 at 10:52 PM, Chris Adams > <[email protected]> wrote: > >> I am running RedHat 5 on a 32 bit system with 2 GB RAM . I have verified >> that the hardware supports at least 4 GB RAM. I added an additional 2 GB >> ram. However, issuing the various command to show memory available, it would >> only show ~2.5 GB. >> >> So, reading about the PAE kernel, I installed it via RPM and after >> rebooting, verified that the /etc/grub.conf file shows the PAE kernel first >> and the Default=0. When I run 'cat /proc/meminfo' and 'free -om', it still >> reports 2.5 GB. >> >> Can someone explain what is going on and what I should do, other than >> upgrading to a 64 bit system? I have done this same update on an identical >> server running CentOS 5 and it recognizes the 4 GB. >> > > Well the first thing is to make sure the servers are identical... make > sure the BIOS version and BIOS settings are exactly the same. I had a > set of boxes where the BIOS's were identical but for some reason the > shipped settings were different and RAM would not show up. After that, > what does uname -a show. > > > I would also try adding the mem=4000M parameter to the kernel boot params. I assume that you mean in /etc/grub.conf. Here it is: # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00 # initrd /initrd-version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title Red Hat Enterprise Linux Server (2.6.18-92.1.18.el5.centos.plusPAE) root (hd0,0) kernel /vmlinuz-2.6.18-92.1.18.el5.centos.plusPAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet mem=4096M initrd /initrd-2.6.18-92.1.18.el5.centos.plusPAE.img append="mem=4096M" _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
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