linux-kernel - Re: [PATCH] mm: introduce dump_page() and print symbolic flag names

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Message-Id: <20091217092720.7ACC.A69D9226@jp.fujitsu.com>
Date:	Thu, 17 Dec 2009 09:34:29 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Americo Wang <xiyou.wangcong@...il.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Wu Fengguang <fengguang.wu@...el.com>,
	Mel Gorman <mel@....ul.ie>, Alex Chiang <achiang@...com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"Li, Haicheng" <haicheng.li@...el.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...e.hu>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH] mm: introduce dump_page() and print symbolic flag names

> On Wed, Dec 16, 2009 at 08:26:40PM +0800, Wu Fengguang wrote:
> >- introduce dump_page() to print the page info for debugging some error condition.
> 
> Since it is for debugging, shouldn't it be surrounded by
> CONFIG_DEBUG_VM too? :-/

No.
typically, wrong driver makes bad_page() calling and MM developer suggested
how to fix in lkml. then, MM developer hope it is enabled on end user's
machine.

Thanks.


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