linux-kernel - Re: [PATCH 1/8] mm: munlock use follow

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Message-ID: <4AA68FEB.6090703@redhat.com>
Date:	Tue, 08 Sep 2009 13:10:03 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Hugh Dickins <hugh.dickins@...cali.co.uk>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Hiroaki Wakabayashi <primulaelatior@...il.com>,
	Lee Schermerhorn <lee.schermerhorn@...com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 1/8] mm: munlock use follow_page

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@...cali.co.uk>

Nice cleanup.

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

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