From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758046Ab0DAQdz (ORCPT ); Thu, 1 Apr 2010 12:33:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:12531 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758007Ab0DAQdf (ORCPT ); Thu, 1 Apr 2010 12:33:35 -0400 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20100401143944.GA2472@linux.vnet.ibm.com> References: <20100401143944.GA2472@linux.vnet.ibm.com> <23274.1269893706@redhat.com> <25276.1269901350@redhat.com> <26760.1269903543@redhat.com> <20100329232636.GT2569@linux.vnet.ibm.com> <2440.1269967151@redhat.com> <21972.1269993064@redhat.com> <10818.1270044273@redhat.com> <15371.1270057054@redhat.com> <19556.1270076008@redhat.com> <14003.1270122314@redhat.com> To: paulmck@linux.vnet.ibm.com Cc: dhowells@redhat.com, Eric Dumazet , Trond.Myklebust@netapp.com, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] NFS: Fix RCU warnings in nfs_inode_return_delegation_noreclaim() [ver #2] Date: Thu, 01 Apr 2010 15:46:51 +0100 Message-ID: <4161.1270133211@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Paul E. McKenney wrote: > So you have objected to needless memory barriers. How do you feel > about possibly needless ACCESS_ONCE() calls? That would work here since it shouldn't emit any excess instructions. David