Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754112Ab3IKONV (ORCPT ); Wed, 11 Sep 2013 10:13:21 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:38898 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752656Ab3IKONU (ORCPT ); Wed, 11 Sep 2013 10:13:20 -0400 Date: Wed, 11 Sep 2013 07:13:02 -0700 From: "Paul E. McKenney" To: Steven Rostedt Cc: Mathieu Desnoyers , Frederic Weisbecker , Peter Zijlstra , Eric Dumazet , linux-kernel@vger.kernel.org, mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, dhowells@redhat.com, edumazet@google.com, darren@dvhart.com, sbw@mit.edu Subject: Re: [PATCH] rcu: Is it safe to enter an RCU read-side critical section? Message-ID: <20130911141302.GA11342@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20130909135656.GT3966@linux.vnet.ibm.com> <20130909101629.32df27a2@gandalf.local.home> <20130909161708.GX3966@linux.vnet.ibm.com> <20130909123422.7936e868@gandalf.local.home> <20130909165836.GB3966@linux.vnet.ibm.com> <20130909172908.GA31239@Krystal> <20130909175656.GF3966@linux.vnet.ibm.com> <20130909214026.GA8830@Krystal> <20130909175917.794b19bd@gandalf.local.home> <20130909223426.GM3966@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130909223426.GM3966@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13091114-1542-0000-0000-00000155B5A6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1271 Lines: 38 On Mon, Sep 09, 2013 at 03:34:26PM -0700, Paul E. McKenney wrote: > On Mon, Sep 09, 2013 at 05:59:17PM -0400, Steven Rostedt wrote: > > On Mon, 9 Sep 2013 17:40:26 -0400 > > Mathieu Desnoyers wrote: > > > > > Agreed. So how about rcu_is_online() ? > > > > Nope, what about all_your_base_are_belong_to_rcu()? > > Let's see if I can remember the candidates... > > rcu_is_cpu_idle() # reversed sense from the others > rcu_is_ignored() # reversed sense from the others > rcu_is_not_active() # reversed sense from the others > rcu_is_watching_cpu() > rcu_read_check() > rcu_is_active() > rcu_is_active_local() > rcu_is_online() > rcu_is_watching_task() > rcu_is_watching_thread() > rcu_is_watching_you() > all_your_base_are_belong_to_rcu() > rcu_is_active_loco() > rcu_kilroy_was_here() > > Maybe I should just lock them all in a room overnight and see which > are still alive in the morning. And after treating injuries, the survivor is rcu_is_watching(). 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/