linux-kernel - Re: [Bad page] trying to free locked page? (Re: [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3)

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Message-Id: <20080618003334.DE2A.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Wed, 18 Jun 2008 00:34:16 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
Cc:	kosaki.motohiro@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Lee Schermerhorn <lee.schermerhorn@...com>,
	Nick Piggin <npiggin@...e.de>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org
Subject: Re: [Bad page] trying to free locked page? (Re: [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3)

> > I got this bug while migrating pages only a few times
> > via memory_migrate of cpuset.
> > 
> > Unfortunately, even if this patch is applied,
> > I got bad_page problem after hundreds times of page migration
> > (I'll report it in another mail).
> > But I believe something like this patch is needed anyway.
> > 
> 
> I got bad_page after hundreds times of page migration.
> It seems that a locked page is being freed.

I can't reproduce this bad page.
I'll try again tomorrow ;)



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