linux-kernel - Re: [PATCH 4/4] capture pages freed during direct reclaim for allocation by the reclaimer

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Date:	Thu, 04 Sep 2008 08:38:28 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	Andy Whitcroft <apw@...dowen.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH 4/4] capture pages freed during direct reclaim for
	allocation by the reclaimer

On Wed, 2008-09-03 at 16:00 -0500, Christoph Lameter wrote:
> Andy Whitcroft wrote:
> 
> >  
> >  #ifndef __GENERATING_BOUNDS_H
> > @@ -208,6 +211,9 @@ __PAGEFLAG(SlubDebug, slub_debug)
> >   */
> >  TESTPAGEFLAG(Writeback, writeback) TESTSCFLAG(Writeback, writeback)
> >  __PAGEFLAG(Buddy, buddy)
> > +PAGEFLAG(BuddyCapture, buddy_capture)	/* A buddy page, but reserved. */
> > +	__SETPAGEFLAG(BuddyCapture, buddy_capture)
> > +	__CLEARPAGEFLAG(BuddyCapture, buddy_capture)
> 
> Doesnt __PAGEFLAG do what you want without having to explicitly specify
> __SET/__CLEAR?

PAGEFLAG() __PAGEFLAG()

does TESTPAGEFLAG() double.

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