Not all memory available

Steven Buehler steve at
Tue Oct 9 22:02:48 UTC 2007

I have a server that had 2GB of memory on it.  I just up it to 8GB.  During
boot, it shows all 8GB, but my Redhat only shows 4GB.  I didn't install the
desktop far as I know.  Is there something else needed to see
more then 4GB?

# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5 (Tikanga)

# uname -a
Linux 2.6.18-8.1.10.el5 #1 SMP Thu Aug 30 20:43:15 EDT 2007 i686
i686 i386 GNU/Linux

# dmesg|grep mem
Memory: 3758888k/4194304k available (2043k kernel code, 39868k reserved,
846k data, 232k init, 2882432k highmem)
Freeing initrd memory: 2239k freed
highmem bounce pool size: 64 pages
Total HugeTLB memory allocated, 0
Non-volatile memory driver v1.2
Freeing unused kernel memory: 232k freed
ehci_hcd 0000:00:1d.7: irq 225, io mem 0xee000000

Thanks in advance for any help.

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