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I am running Redhat 8 on a 4 cpu server with 4.5 Gb of Ram. Currently I am running the 2.4.20-27.8smp kernel, but the system does not seem to be using all of the memory. When I do cat /proc/meminfo this is what I see:
Thanks to all for the responses. Ya know, I thought BIGMEM was for SMP systems with over 4 Gb of memory, but when I booted the BIGMEM kernel last week, the system only saw 1 CPU, so I booted back into the SMP kernel, now I see all 4 CPU's but less than the 4.5 Gb of memory the system really has. That's why I was confused. Is there a switch or anything when booting the BIGMEM kernel so it sees all 4 CPU's AND 4.5 Gb of memory?
From what I see there's no RPM for RH 8 with both SMP and support of 64GB RAM. It means you'd need to compile it yourself. No matter if you start from BIGMEM or from SMP source, you'd have only one option to change. Do you have source of one of them?