linux-kernel - Re: [PATCH] migration_entry

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Message-Id: <20080618142517.37A6.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Wed, 18 Jun 2008 14:26:14 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	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,
	"hugh@...itas.com" <hugh@...itas.com>
Subject: Re: [PATCH] migration_entry_wait fix.

> From: Daisuke Nishimura <nishimura@....nes.nec.co.jp>
> Signed-off-by: Daisuke Nishimura <nishimura@....nes.nec.co.jp>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> ---
>  mm/migrate.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> Index: test-2.6.26-rc5-mm3/mm/migrate.c
> ===================================================================
> --- test-2.6.26-rc5-mm3.orig/mm/migrate.c
> +++ test-2.6.26-rc5-mm3/mm/migrate.c
> @@ -243,7 +243,8 @@ void migration_entry_wait(struct mm_stru
>  
>  	page = migration_entry_to_page(entry);
>  
> -	get_page(page);
> +	if (!page_cache_get_speculative(page))
> +		goto out;
>  	pte_unmap_unlock(ptep, ptl);
>  	wait_on_page_locked(page);
>  	put_page(page);

sorry, so late responce.

Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>



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