Re: [patch 0/4] ia64 SPARSEMEM

KAMEZAWA Hiroyuki
2005-05-30T00:18:22Z

Hi Bob,
> Another point to consider...
>
> Both RH & SuSE release a single kernel binary image that is used on all
> platforms. IA64 discovers the platform type (Dig, SGI, HP, ...) during
> boot & sets up platform callouts to platform specific functions. We
> will need to select values for both CONFIG_SECTION_BITS &
> CONFIG_PHYSICAL_MEMORY_BITS that work on all IA64 platforms (or make these
> values configurable at runtime)
>
After reading e-mails,
physical address size -- 50bits
section size -- 32bits
will be good as a default.
This can work on any ia64 platforms && Full-sized Hugetlb can be used without any tuning.

If people want to hot-remove smaller memory sections, he should adjust the params.

-- Kame