From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754767AbYISQDF (ORCPT ); Fri, 19 Sep 2008 12:03:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753087AbYISQCx (ORCPT ); Fri, 19 Sep 2008 12:02:53 -0400 Received: from qb-out-0506.google.com ([72.14.204.228]:50013 "EHLO qb-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752941AbYISQCw (ORCPT ); Fri, 19 Sep 2008 12:02:52 -0400 Message-ID: <48D3CD48.4090701@colorfullife.com> Date: Fri, 19 Sep 2008 18:03:20 +0200 From: Manfred Spraul User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: paulmck@linux.vnet.ibm.com CC: Lai Jiangshan , Ingo Molnar , Linux Kernel Mailing List , Dipankar Sarma , Andrew Morton , Peter Zijlstra Subject: Re: [RFC PATCH] rcu: introduce kfree_rcu() References: <48D1D694.9010802@cn.fujitsu.com> <20080918064406.GC6397@linux.vnet.ibm.com> <48D2882B.9060806@colorfullife.com> <20080918174619.GA28186@linux.vnet.ibm.com> In-Reply-To: <20080918174619.GA28186@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Paul E. McKenney wrote: > The rcu_barrier() family of functions registers a callback on each CPU, > and waits until all these callbacks have been invoked. The CPU offlining > process preserves the order of the callbacks that were registered on a > given CPU. Thus, when rcu_barrier() returns, all RCU callbacks previously > registered are guaranteed to have already been invoked, regardless of > what CPUs might have been offlined and onlined in the meantime. > > You are right: I mixed up rcu_barrier() and synchronize_rcu(). -- Manfred