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SubjectRE: sparc64 pgalloc.h pgd_quicklist question
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> On Fri, May 24, 2002 at 09:05:26AM -0700, David S. Miller wrote:
> > From: "Holzrichter, Bruce" <bruce.holzrichter@monster.com>
> > Date: Fri, 24 May 2002 11:12:25 -0500
> >
> > Anyway, After looking at the SMP and UP configuration in
> pgalloc.h, could
> > you simply remove the UP/SMP differentiation in the
> routines, as in my
> > attachment? It looks to me, that the struct for
> pgt_quicklist is built
> > correctly for UP or SMP above this? I could be wrong on this....
> >
> > That would waste 3/4 of every page allocated for PGDs.
> >
> > We use the pointers to keep track of which bits of the page
> > are allocated to PGDs. So how about rewriting our code to
> > use bits in page->flags instead?
>
> See arch/arm/mm/small_page.c (2.4) or
> arch/arm/mach-arc/small_page.c for
> a sub-page allocator using page->flags.
>

Russell,

I meant to ask this a little bit back, while I was looking through this
code. In the 2.5 iteration you have for small_page.c your using the
next_hash and pprev_hash entries, which no longer are available in the
struct page, as far as I have looked, unless your struct page is defined
elsewhere, other than linux/mm.h? Just wondering, as I pull apart the mm
code in what time I have looking at this.

Thanks
Bruce H.


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