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Date: Mon, 6 Aug 2007 11:11:54 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
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To: Peter Zijlstra <a.p.zijlstra@chello.nl>
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>
Subject: Re: [PATCH 03/10] mm: tag reseve pages
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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 ???