Messages in this thread | | | From | "Holzrichter, Bruce" <> | Subject | RE: sparc64 pgalloc.h pgd_quicklist question | Date | Thu, 6 Jun 2002 21:10:40 -0500 |
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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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