From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761423AbZJOJpe (ORCPT ); Thu, 15 Oct 2009 05:45:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756241AbZJOJpe (ORCPT ); Thu, 15 Oct 2009 05:45:34 -0400 Received: from slow3-v.mail.gandi.net ([217.70.178.89]:53234 "EHLO slow3-v.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756222AbZJOJpd (ORCPT ); Thu, 15 Oct 2009 05:45:33 -0400 Date: Thu, 15 Oct 2009 02:35:41 -0700 From: Josh Triplett To: Ingo Molnar Cc: "Paul E. McKenney" , linux-kernel@vger.kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, dvhltc@us.ibm.com, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, npiggin@suse.de, jens.axboe@oracle.com Subject: Re: [PATCH tip/core/rcu 0/6] rcu: fix synchronize_rcu_expedited(), update docs, improve perf Message-ID: <20091015093541.GA8057@feather> References: <20091014171517.GA13635@linux.vnet.ibm.com> <20091015092155.GD10546@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20091015092155.GD10546@elte.hu> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 15, 2009 at 11:21:55AM +0200, Ingo Molnar wrote: > * Paul E. McKenney wrote: > > > This patchset contains a bug fix, a performance improvement, and > > documentation updates: > > > > o Update Documentation/RCU/trace.txt to reflect recent changes > > (including the removal of rcupreempt.c). > > i've applied this to the .33 queue. I realize this only represents a documentation change, but it updates the documentation to match the code in 2.6.32, which seems worth doing. > > o Add the new rnp->blocked_tasks field to the rcuhier trace file > > in debugfs. > > > > o Update the Documentation/RCU/trace.txt documentation to include > > the rnp->blocked_tasks tracing. > > i've applied these to the .33 queue as well. (both tracing and > documentation is not urgent material.) I also did minor edits to the > changelogs. Those who debug RCU-related issues would disagree that having adequate tracing information proves non-urgent. :) The tracing information this adds proves essential for debugging issues with the new hierarchical RCU. (And the documentation patch just documents the added tracing information, so both should go together as a unit; actually, perhaps they should get merged.) - Josh Triplett