linux-kernel - Re: [PATCH 03/10] mm: tag reseve pages

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Message-ID: <p73r6mglaog.fsf@bingen.suse.de>
Date:	06 Aug 2007 21:34:07 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <clameter@....com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	David Miller <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Phillips <phillips@...gle.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Matt Mackall <mpm@...enic.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Steve Dickson <SteveD@...hat.com>
Subject: Re: [PATCH 03/10] mm: tag reseve pages

Christoph Lameter <clameter@....com> writes:

> 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 ???

Note it's an union.

-Andi
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