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

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Message-ID: <48BEFAF9.3030006@linux-foundation.org>
Date:	Wed, 03 Sep 2008 16:00:41 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Andy Whitcroft <apw@...dowen.org>
CC:	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

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?


How does page allocator fastpath behavior fare with this pathch?
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