Re: hugemem kernel

On Tue, 2006-03-28 at 09:49 +0800, Ed Greshko wrote:
> Stephen Mah wrote:
> > Can someone explain to me the memory limitation for RHEL3's kernel and
> > the difference between the hugemem kernel?
> > 
> 
> Would reading the release notes be of value?
> 
> Red Hat Enterprise Linux 3 includes a new kernel known as the hugemem
> kernel. This kernel supports a 4GB per process user space (versus 3GB
> for the other kernels), and a 4GB direct kernel space. Using this kernel
> allows Red Hat Enterprise Linux to run on systems with up to 64GB of
> main memory. The hugemem kernel is required in order to use all the
> memory in system configurations containing more than 16GB of memory. The
> hugemem kernel can also benefit configurations running with less memory
> (if running an application that could benefit from the larger per
> process user space, for example.)

Also remember all of this applies to the i386 platform.  If you're
running RHEL x86_64 on an AMD Opteron or Intel EM64T, there is only
kernel and kernel-smp  :)

/Brian/

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       Brian Long                      |         |           |
       IT Data Center Systems          |       .|||.       .|||.
       Cisco Linux Developer           |   ..:|||||||:...:|||||||:..
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