Re: [RFC] [PATCH 8/9] memcg: remove page_cgroup pointer from memmap

Dave Hansen
2008-09-12T16:23:33Z

On Fri, 2008-09-12 at 09:19 -0700, Dave Hansen wrote:
> On Fri, 2008-09-12 at 09:12 -0700, Balbir Singh wrote:
> > 3. Integrate with sparsemem (last resort for performance), Dave Hansen suggested
> > adding a mem_section member and using that.
>
> I also suggested using the sparsemem *structure* without necessarily
> using it for pfn_to_page() lookups. That'll take some rework to
> separate out SPARSEMEM_FOR_MEMMAP vs. CONFIG_SPARSE_STRUCTURE_FUN, but
> it should be able to be prototyped pretty fast.

Heh, now that I think about it, you could also use vmemmap to do the
same thing.

-- Dave