Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753857Ab3EARbh (ORCPT ); Wed, 1 May 2013 13:31:37 -0400 Received: from e38.co.us.ibm.com ([32.97.110.159]:51551 "EHLO e38.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752632Ab3EARba (ORCPT ); Wed, 1 May 2013 13:31:30 -0400 Date: Wed, 1 May 2013 10:30:35 -0700 From: "Paul E. McKenney" To: Peter Zijlstra Cc: Eric Dumazet , Julian Anastasov , Simon Horman , Ingo Molnar , lvs-devel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, linux-kernel@vger.kernel.org, Pablo Neira Ayuso , Dipankar Sarma Subject: Re: [PATCH v2 1/2] sched: Add cond_resched_rcu_lock() helper Message-ID: <20130501173035.GT3780@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1367290378-29224-2-git-send-email-horms@verge.net.au> <20130430072944.GA13959@verge.net.au> <20130501091012.GB28253@dyad.programming.kicks-ass.net> <20130501124637.GO3780@linux.vnet.ibm.com> <20130501151752.GA7521@dyad.programming.kicks-ass.net> <1367422195.11020.46.camel@edumazet-glaptop> <20130501160218.GQ3780@linux.vnet.ibm.com> <20130501165748.GD7521@dyad.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130501165748.GD7521@dyad.programming.kicks-ass.net> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13050117-5518-0000-0000-00000E2DF356 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 851 Lines: 19 On Wed, May 01, 2013 at 06:57:49PM +0200, Peter Zijlstra wrote: > On Wed, May 01, 2013 at 09:02:18AM -0700, Paul E. McKenney wrote: > > My guess would be for the case where sched_preempt_enable_no_resched() > > is followed some time later by cond_resched(). > > I might hope not.. preempt_enable_no_resched() is nasty and you're likely to be > hit with a frozen fish of sorts by tglx if you try to use it ;-) I will stick with my guess, though I agree that if I am correct, this situation almost certainly predates tglx's Linux-related use of frozen fish as projectile weapons. ;-) 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/