Re: [PATCH] anobjrmap 1/6 objrmap

[William Lee Irwin III]

On Sat, Mar 20, 2004 at 01:30:09PM +0100, Andrea Arcangeli wrote:
> I'm working on my code yes, I think my code is finished, I prefer my
> design for the various reasons explained in the other emails (you don't
> swap so you can't appreciate the benefits, you only have to check that
> performs as well as Hugh's code).
> Hugh's and your code is unstable in objrmap, you can find the details in
> the email I sent to Hugh, mine is stable (running such simulation for a
> few days just fine on 4-way xeon, without my objrmap fixes it live locks
> as soon as it hits swap).
> You find my anon_vma in 2.6.5-rc1aa2, it's rock solid, just apply the
> whole patch and compare it with your other below results. thanks.

There's an outstanding issue that's biting people on ppc64, which is
that arch/ppc64/mm/tlb.c uses the mm pointer and virtual addresses that
used to be put into page->mapping and page->index respectively for
pagetable pages to assist updates to the inverted pagetable. Without
leaving that assignment and invalidation of page->mapping and page->index
in place or converting ppc64 to other methods of carrying out its
inverted pagetable updates, ppc64 (e.g. G5 Macs) support is broken.


-- wli
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