linux-kernel - Re: [PATCH 1/7] KAMEZAWA Hiroyuki hot-remove patches

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Message-ID: <Pine.LNX.4.64.0706180954320.4751@schroedinger.engr.sgi.com>
Date:	Mon, 18 Jun 2007 09:56:20 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Mel Gorman <mel@....ul.ie>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	kamezawa.hiroyu@...fujitsu.com
Subject: Re: [PATCH 1/7] KAMEZAWA Hiroyuki hot-remove patches

On Mon, 18 Jun 2007, Mel Gorman wrote:

> @@ -632,18 +632,27 @@ static int unmap_and_move(new_page_t get
>  			goto unlock;
>  		wait_on_page_writeback(page);
>  	}
> -
> +	/* anon_vma should not be freed while migration. */
> +	if (PageAnon(page)) {
> +		rcu_read_lock();
> +		rcu_locked = 1;
> +	}

We agreed on doing rcu_read_lock removing the status variable 
and checking for PageAnon(). Doing so deuglifies the 
function.
-
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