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SubjectRe: [PATCH][2.6.20-rc1-mm1] sparsemem vmem_map optimzed pfn_valid() [0/2]
On Sat, 16 Dec 2006 10:38:53 -0800 (PST)
Christoph Lameter <clameter@sgi.com> wrote:

> On Sat, 16 Dec 2006, KAMEZAWA Hiroyuki wrote:
>
> > By this, we'll not access mem_section[] in usual ops.
>
> Why do we need mem_section? We have a page table that fulfills the same
> role.
>
Basically, we don't need it.
But I use mem_section[] in bootstrap and I want to keep patches small in this
time.
I think it's not too late that we'll consider removing it after implementing
memory hot unplug.(and confirm we never use it.)

-Kame

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