From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756124AbdDGP3q (ORCPT ); Fri, 7 Apr 2017 11:29:46 -0400 Received: from mail.kernel.org ([198.145.29.136]:51494 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755811AbdDGP3j (ORCPT ); Fri, 7 Apr 2017 11:29:39 -0400 Date: Fri, 7 Apr 2017 11:29:35 -0400 From: Steven Rostedt To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Andrew Morton Subject: Re: [PATCH 5/5 v2] rcu: Fix dyntick-idle tracing Message-ID: <20170407112935.27f265f0@gandalf.local.home> In-Reply-To: <20170407150922.GV1600@linux.vnet.ibm.com> References: <20170407140106.051135969@goodmis.org> <20170407140308.915512940@goodmis.org> <20170407144011.GS1600@linux.vnet.ibm.com> <20170407105316.0cda3282@gandalf.local.home> <20170407150922.GV1600@linux.vnet.ibm.com> X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; 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 Fri, 7 Apr 2017 08:09:22 -0700 "Paul E. McKenney" wrote: > > > > > > Yeah, I am a bit concerned about idle-entry latency... > > > > > > > Which should now be fine because of the inlined this_cpu_inc/dec() > > which is very efficient and made for fast paths like this. > > OK, I am willing to let people complain if they can measure the > difference. If they can measure the difference, there are some things > we can do. Again, I was getting this_cpu_inc/dec confused with __this_cpu_inc/dec. I'll update my patch to fix that. -- Steve