Re: [PATCH] move the kernel to 16MB for NUMA-Q

From: H. Peter Anvin
Date: Mon Jun 11 2007 - 13:59:14 EST

Rene Herman wrote:
> Aligning the kernel image on 4M could gain an additional TLB entry if
> the kernel image would fit in one (4M aligned) hugepage, but not in the
> 3M that's left after loading the kernel at 1M physical. And that stuff
> about the MTRRs...

Yup. Most CPUs won't actually use a largepage for the kernel if it's
below 4 MB (2 MB with PAE, so that's what x86-64 uses.)

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