From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id 236DE600363 for ; Wed, 17 Mar 2010 20:34:33 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o2I0YUPL012533 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Thu, 18 Mar 2010 09:34:30 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 4764E45DE70 for ; Thu, 18 Mar 2010 09:34:30 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 22ED845DE60 for ; Thu, 18 Mar 2010 09:34:30 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 01D231DB8044 for ; Thu, 18 Mar 2010 09:34:29 +0900 (JST) Received: from m108.s.css.fujitsu.com (m108.s.css.fujitsu.com [10.249.87.108]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id A355C1DB8037 for ; Thu, 18 Mar 2010 09:34:29 +0900 (JST) Date: Thu, 18 Mar 2010 09:30:42 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [PATCH 02/11] mm,migration: Do not try to migrate unmapped anonymous pages Message-Id: <20100318093042.b6b77d8f.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: References: <1268412087-13536-1-git-send-email-mel@csn.ul.ie> <1268412087-13536-3-git-send-email-mel@csn.ul.ie> <28c262361003141728g4aa40901hb040144c5a4aeeed@mail.gmail.com> <20100315143420.6ec3bdf9.kamezawa.hiroyu@jp.fujitsu.com> <20100315112829.GI18274@csn.ul.ie> <1268657329.1889.4.camel@barrios-desktop> <20100315142124.GL18274@csn.ul.ie> <20100316084934.3798576c.kamezawa.hiroyu@jp.fujitsu.com> <20100317111234.d224f3fd.kamezawa.hiroyu@jp.fujitsu.com> <28c262361003162000w34cc13ecnbd32840a0df80f95@mail.gmail.com> <20100317121551.b619f55b.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Christoph Lameter Cc: Minchan Kim , Mel Gorman , Andrew Morton , Andrea Arcangeli , Adam Litke , Avi Kivity , David Rientjes , KOSAKI Motohiro , Rik van Riel , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Wed, 17 Mar 2010 11:41:10 -0500 (CDT) Christoph Lameter wrote: > On Wed, 17 Mar 2010, KAMEZAWA Hiroyuki wrote: > > > Ah, my point is "how use-after-free is detected ?" > > The slab layers do not check for use after free conditions if > SLAB_DESTROY_BY_RCU is set. It is legal to access the object after a > kfree() etc as long as the RCU period has not passed. > > > Then, my question is > > "Does use-after-free check for SLAB_DESTROY_BY_RCU work correctly ?" > > Use after free checks are not performed for SLAB_DESTROY_BY_RCU slabs. > Thank you for kindly clarification. I have no more concerns. Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org