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Date: Tue, 08 Sep 2009 13:10:03 -0400
From: Rik van Riel <riel@redhat.com>
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Subject: Re: [PATCH 1/8] mm: munlock use follow_page
References: <Pine.LNX.4.64.0909072222070.15424@sister.anvils> <Pine.LNX.4.64.0909072227140.15430@sister.anvils>
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To: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>, Hiroaki Wakabayashi <primulaelatior@gmail.com>, Lee Schermerhorn <lee.schermerhorn@hp.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Linus Torvalds <torvalds@linux-foundation.org>, Nick Piggin <npiggin@suse.de>, linux-kernel@vger.kernel.org, linux-mm@kvack.org
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Hugh Dickins wrote:
> Hiroaki Wakabayashi points out that when mlock() has been interrupted
> by SIGKILL, the subsequent munlock() takes unnecessarily long because
> its use of __get_user_pages() insists on faulting in all the pages
> which mlock() never reached.

> Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>

Nice cleanup.

Acked-by: Rik van Riel <riel@redhat.com>

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