Subject: Re: [PATCH 07/21] mm: Use refcounts for page_lock_anon_vma()
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>, Avi Kivity <avi@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>, Rik van Riel <riel@redhat.com>,
        Ingo Molnar <mingo@elte.hu>, akpm@linux-foundation.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
        linux-mm@kvack.org, Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        David Miller <davem@davemloft.net>,
        Hugh Dickins <hugh.dickins@tiscali.co.uk>, Mel Gorman <mel@csn.ul.ie>,
        Nick Piggin <npiggin@kernel.dk>,
        Paul McKenney <paulmck@linux.vnet.ibm.com>,
        Yanmin Zhang <yanmin_zhang@linux.intel.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>
In-Reply-To: <20101129113511.296169c9.kamezawa.hiroyu@jp.fujitsu.com>
References: <20101126143843.801484792@chello.nl>
	 <20101126145410.655255418@chello.nl>
	 <20101129113511.296169c9.kamezawa.hiroyu@jp.fujitsu.com>
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Date: Mon, 29 Nov 2010 21:41:23 +0100
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On Mon, 2010-11-29 at 11:35 +0900, KAMEZAWA Hiroyuki wrote:
> On Fri, 26 Nov 2010 15:38:50 +0100
> Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> 
> > Convert page_lock_anon_vma() over to use refcounts. This is
> > done for each of convertion of anon_vma from spinlock to mutex.
> > 
> > Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> 
> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> 
> Does this patch affect only page_referenced() and try_to_unmap() ?

git grep page_lock_anon_vma reveals that
mm/memory-failure.c:collect_procs_anon() is also affected.
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