Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754053Ab3IINhA (ORCPT ); Mon, 9 Sep 2013 09:37:00 -0400 Received: from merlin.infradead.org ([205.233.59.134]:51073 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753612Ab3IINg6 (ORCPT ); Mon, 9 Sep 2013 09:36:58 -0400 Date: Mon, 9 Sep 2013 15:36:04 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Frederic Weisbecker , Eric Dumazet , linux-kernel@vger.kernel.org, mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, darren@dvhart.com, sbw@mit.edu, cl@linux.com Subject: Re: [PATCH] rcu: Is it safe to enter an RCU read-side critical section? Message-ID: <20130909133604.GC31370@twins.programming.kicks-ass.net> References: <20130905195234.GA20555@linux.vnet.ibm.com> <20130906105934.GF20519@somewhere> <20130906151851.GQ3966@linux.vnet.ibm.com> <1378488088.31445.39.camel@edumazet-glaptop> <20130906174117.GU3966@linux.vnet.ibm.com> <20130906185927.GE2706@somewhere> <20130909105347.GK31370@twins.programming.kicks-ass.net> <20130909132343.GN3966@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130909132343.GN3966@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 874 Lines: 17 On Mon, Sep 09, 2013 at 06:23:43AM -0700, Paul E. McKenney wrote: > And guys, I have to say that the advice on which per-CPU primitive to use > varies wildly and randomly. For all I know, each of you individually > might well be sticking to the same story, but taken together, your > collective advice is strongly resembling white noise. Its partly because cl and I disagree on things. He doesn't seem to care much about validation and believes that people will not make mistakes with this stuff. And partly because I didn't get what was going on. While Frederic's explanation might be correct it was incomprehensible for me. -- 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/