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Subject: Re: [PATCH 03/10] mm: tag reseve pages
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
       David Miller <davem@davemloft.net>,
       Andrew Morton <akpm@linux-foundation.org>,
       Daniel Phillips <phillips@google.com>,
       Pekka Enberg <penberg@cs.helsinki.fi>, Matt Mackall <mpm@selenic.com>,
       Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
       Steve Dickson <SteveD@redhat.com>
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Date: Mon, 06 Aug 2007 20:28:20 +0200
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On Mon, 2007-08-06 at 11:11 -0700, Christoph Lameter wrote:
> On Mon, 6 Aug 2007, Peter Zijlstra wrote:
> 
> > ===================================================================
> > --- linux-2.6-2.orig/include/linux/mm_types.h
> > +++ linux-2.6-2/include/linux/mm_types.h
> > @@ -60,6 +60,7 @@ struct page {
> >  	union {

	^^^^^^^^^^
> >  		pgoff_t index;		/* Our offset within mapping. */
> >  		void *freelist;		/* SLUB: freelist req. slab lock */
> > +		int reserve;		/* page_alloc: page is a reserve page */
> 
> Extending page struct ???