Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754988AbaBTSMH (ORCPT ); Thu, 20 Feb 2014 13:12:07 -0500 Received: from e38.co.us.ibm.com ([32.97.110.159]:55324 "EHLO e38.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752950AbaBTSME (ORCPT ); Thu, 20 Feb 2014 13:12:04 -0500 Date: Thu, 20 Feb 2014 10:11:46 -0800 From: "Paul E. McKenney" To: Torvald Riegel Cc: Linus Torvalds , Will Deacon , Peter Zijlstra , Ramana Radhakrishnan , David Howells , "linux-arch@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "mingo@kernel.org" , "gcc@gcc.gnu.org" Subject: Re: [RFC][PATCH 0/5] arch: atomic rework Message-ID: <20140220181146.GU4250@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1392740258.18779.7732.camel@triegel.csb> <1392752867.18779.8120.camel@triegel.csb> <20140220040102.GM4250@linux.vnet.ibm.com> <20140220083032.GN4250@linux.vnet.ibm.com> <1392918846.18779.10204.camel@triegel.csb> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1392918846.18779.10204.camel@triegel.csb> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14022018-1344-0000-0000-000005ED9A96 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 20, 2014 at 06:54:06PM +0100, Torvald Riegel wrote: > xagsmtp4.20140220175519.1127@vmsdvm6.vnet.ibm.com > X-Xagent-Gateway: vmsdvm6.vnet.ibm.com (XAGSMTP4 at VMSDVM6) > > On Thu, 2014-02-20 at 00:30 -0800, Paul E. McKenney wrote: > > Well, all the compilers currently convert consume to acquire, so you have > > your wish there. Of course, that also means that they generate actual > > unneeded memory-barrier instructions, which seems extremely sub-optimal > > to me. > > GCC doesn't currently, but it also doesn't seem to track the > dependencies, but that's a bug: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59448 Ah, cool! Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/