Recompiling the kernel should work, but if you're using Red Hat (which I think you are, tho my reading between the lines may be wrong), the easier option is to use the -enterprise or -hugemem (on RHEL 2.1 and RHEL 3 respectively) kernel. The i686 kernel will work just fine, even on an AMD system.
On Wed, 02 Feb 2005, James wrote: > Mike, > > free: > total used free shared buffers cached > Mem: 4009076 2400212 1608864 0 226400 1465612 > -/+ buffers/cache: 708200 3300876 > > cat /proc/meminfo: > total: used: free: shared: buffers: cached: > Mem: 4105293824 2457948160 1647345664 0 231841792 1500786688 > MemTotal: 4009076 kB > > Trust me, it is only recognizing 4 GB. Which makes sense because you have > to recompile the kernel with high memory support in order to access > 4 > GB. > > My question, though, is if I can use the kernel high memory (> 4 GB) > option with AMD64 processors? > My understanding is that the feature that allows you to access 4 - 64 GB > is one that exists in Intel chips, but I do not know if it exists in AMD > chips. I could however, access all the RAM if I installed 64 bit Red > Hat because the natural limit RAM limit of a 64 bit chip utilized by a > 64 bit OS is 2^64 bytes opposed to the limit on a 32 bit chip, 2^32 or 4 > GB. The > 4 GB access is a hack, as far as I can tell. > > Please correct me if I'm wrong, I am certainly not an expert on processor > or kernel architecture. > > Thanks, > James > > > > > We've got a quad Xeon (which is 32bit) with 10GB of RAM using RHEL2.1. > > Seems to be humming along just fine. What makes you think that it's not > > using all of your memory? > > > > Mike > > > -- > TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug > TriLUG Organizational FAQ : http://trilug.org/faq/ > TriLUG Member Services FAQ : http://members.trilug.org/services_faq/ > TriLUG PGP Keyring : http://trilug.org/~chrish/trilug.asc > -- John Berninger GPG Key ID: A8C1D45C Fingerprint: B1BB 90CB 5314 3113 CF22 66AE 822D 42A8 A8C1 D45C Ita erat quando hic adveni. -- -- TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug TriLUG Organizational FAQ : http://trilug.org/faq/ TriLUG Member Services FAQ : http://members.trilug.org/services_faq/ TriLUG PGP Keyring : http://trilug.org/~chrish/trilug.asc
