linux-kernel - Re: [patch 3/3] mm: add arch_alloc

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Message-ID: <20061011145643.GA5259@wotan.suse.de>
Date:	Wed, 11 Oct 2006 16:56:43 +0200
From:	Nick Piggin <npiggin@...e.de>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...l.org>,
	Linux Memory Management <linux-mm@...ck.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [patch 3/3] mm: add arch_alloc_page

On Wed, Oct 11, 2006 at 04:48:24PM +0200, Martin Schwidefsky wrote:
> On Sun, 2006-10-08 at 11:39 +1000, Nick Piggin wrote:
> > >On Sat,  7 Oct 2006 15:06:04 +0200 (CEST)
> > >Nick Piggin <npiggin@...e.de> wrote:
> > >
> > >
> > >>Add an arch_alloc_page to match arch_free_page.
> > >>
> > >
> > >umm.. why?
> > >
> > 
> > I had a future patch to more kernel_map_pages into it, but couldn't
> > decide if that's a generic kernel feature that is only implemented in
> > 2 architectures, or an architecture speicifc feature. So I left it out.
> > 
> > But at least Martin wanted a hook here for his volatile pages patches,
> > so I thought I'd submit this patch anyway.
> 
> With Nicks patch I can use arch_alloc_page instead of page_set_stable,
> but I can still not use arch_free_page instead of page_set_unused
> because it is done before the check for reserved pages. If reserved
> pages go away or the arch_free_page call would get moved after the check
> I could replace page_set_unused as well. So with Nicks patch we are only
> halfway there..

Ahh, but with my patchSET I think we are all the way there ;)

Nick
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