linux-kernel - Re: [PATCH 3/4] mm: move_page_tables{,

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Date:	Wed, 06 Jun 2007 21:12:14 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Ollie Wild <aaw@...gle.com>
Cc:	linux-kernel@...r.kernel.org, parisc-linux@...ts.parisc-linux.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org,
	Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <ak@...e.de>
Subject: Re: [PATCH 3/4] mm: move_page_tables{,_up}

On Wed, 2007-06-06 at 12:06 -0700, Ollie Wild wrote:
> On 6/5/07, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> > Provide functions for moving page tables upwards.
> 
> Now that we're initializing the temporary stack location to
> STACK_TOP_MAX, do we still need move_page_tables_up() for variable
> length argument support?  I originally added it into shift_arg_pages()
> to support 32-bit apps exec'ing 64-bit apps when we were using
> TASK_SIZE as our temporary location.
> 
> Maybe we should decouple this patch from the others and submit it as
> an enhancement to support memory defragmentation.

PA-RISC will still need it, right?

On the defrag thingy, I talked with Mel today, and neither of us can see
a usefull application of these functions to his defrag work.

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