Re: [PATCH 2/2] page table iterators

[Nick Piggin <nickpiggin@yahoo.com.au>]

Hugh Dickins wrote:

> I'm off to bed, but since your appetite for looking at patches
> is greater than mine, I'll throw what I'm currently testing over
> the wall to you now.  Against 2.6.11-rc4-bk9, but my starting point
> was obviously your patches.  Not yet split up, but clearly should be.

Yeah you've snuck a few other clever things in there ;)

> Includes mm/swapfile.c which you missed.  I'm inlining pmd and pud

Thanks.

> levels, but not pte and pgd levels.  No description yet, sorry.

OK - that's probably sufficient for debugging. There is only so
much that can go wrong in the middle levels... how does it look
performance wise? (I can give it a test when it gets split out)

> One point worth making, I do believe throughout that whatever the
> address layout, "end" cannot be 0 - BUG_ON(addr >= end) assures.
> 

OK after sleeping on it, I'm warming to your way.

I don't think it makes something like David's modifications any
easier, but mine didn't go a long way to that end either. And
being a more incremental approach gives us more room to move in
future (for example, maybe toward something that really *will*
accommodate the bitmap walking code nicely).

So I'd be pretty happy for you to queue this up with Andrew for
2.6.12. Anyone else?

Nick