From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756144AbbFRRKf (ORCPT ); Thu, 18 Jun 2015 13:10:35 -0400 Received: from smtprelay0239.hostedemail.com ([216.40.44.239]:41657 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752824AbbFRRK1 (ORCPT ); Thu, 18 Jun 2015 13:10:27 -0400 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::::::::::::::::::::::::,RULES_HIT:41:355:379:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1541:1593:1594:1711:1730:1747:1777:1792:2194:2199:2393:2553:2559:2562:2687:3138:3139:3140:3141:3142:3352:3622:3865:3866:3867:3868:3871:3872:3873:3874:5007:6248:6261:6742:7875:7903:8957:9108:10004:10226:10400:10450:10455:10848:10967:11232:11658:11914:12114:12517:12519:12740:13069:13149:13160:13161:13229:13230:13311:13357:14096:14097:19904:19999:21080,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: dress55_3da8f0e675244 X-Filterd-Recvd-Size: 2802 Date: Thu, 18 Jun 2015 13:10:22 -0400 From: Steven Rostedt To: "Paul E. McKenney" Cc: Peter Zijlstra , Ingo Molnar , umgwanakikbuti@gmail.com, mingo@elte.hu, ktkhai@parallels.com, tglx@linutronix.de, juri.lelli@gmail.com, pang.xunlei@linaro.org, oleg@redhat.com, wanpeng.li@linux.intel.com, linux-kernel@vger.kernel.org, Al Viro , Linus Torvalds Subject: Re: [PATCH 11/18] seqcount: Introduce raw_write_seqcount_barrier() Message-ID: <20150618131022.3f502e60@gandalf.local.home> In-Reply-To: <20150618165406.GC3913@linux.vnet.ibm.com> References: <20150611214557.GA4249@linux.vnet.ibm.com> <20150617122924.GP3644@twins.programming.kicks-ass.net> <20150617145712.GZ3913@linux.vnet.ibm.com> <20150617154926.GE19282@twins.programming.kicks-ass.net> <20150617163731.GD3913@linux.vnet.ibm.com> <20150617171140.GG19282@twins.programming.kicks-ass.net> <20150617180214.GJ3913@linux.vnet.ibm.com> <20150618091505.GI19282@twins.programming.kicks-ass.net> <20150618094014.GC1094@gmail.com> <20150618104015.GL19282@twins.programming.kicks-ass.net> <20150618165406.GC3913@linux.vnet.ibm.com> X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.25; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 18 Jun 2015 09:54:07 -0700 "Paul E. McKenney" wrote: > Yep, I have to frequently remind them that most projects need to support > old compilers. And I did point out that the commentary at the end > of that document would not encourage adoption of C11. They of course > felt this was unfair of me, so I have to thank you both for proving the > correctness of my reply to them. Although you guys didn't use quite as > many swear words as I would have expected. ;-) I could add a few more if you would like ;-) What's their issue? Is there some kind of benchmark war going on between different compilers? Where they want want to prove they can produce the absolute fastest code possible, but only use single threaded apps and screw those that must support multi-threaded applications. My phone and my camera have multicore systems. Single threaded is not the way of the future. Which ever compiler makes it easier to write multi-threaded applications is going to win, regardless of how well a compiler can claim they optimize code the best for a single threaded app. -- Steve