Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753625AbZCUS7E (ORCPT ); Sat, 21 Mar 2009 14:59:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752937AbZCUS6v (ORCPT ); Sat, 21 Mar 2009 14:58:51 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.146]:39715 "EHLO e6.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752873AbZCUS6t (ORCPT ); Sat, 21 Mar 2009 14:58:49 -0400 Date: Sat, 21 Mar 2009 11:58:46 -0700 From: "Paul E. McKenney" To: Arjan van de Ven Cc: dipankar@in.ibm.com, linux-input@vger.kernel.org, dmitry.torokhov@gmail.com, linux-kernel@vger.kernel.org Subject: Re: Question about usage of RCU in the input layer Message-ID: <20090321185846.GB7148@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20090319085628.GA6167@in.ibm.com> <20090319071841.63334eff@infradead.org> <20090320020750.GA6807@linux.vnet.ibm.com> <20090319202032.4c971d92@infradead.org> <20090320044541.GE6807@linux.vnet.ibm.com> <20090320065058.65d01771@infradead.org> <20090320143104.GA6698@linux.vnet.ibm.com> <20090320111354.679ab53d@infradead.org> <20090321012746.GM6698@linux.vnet.ibm.com> <20090320215825.19b8baae@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090320215825.19b8baae@infradead.org> User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 784 Lines: 21 On Fri, Mar 20, 2009 at 09:58:25PM -0700, Arjan van de Ven wrote: > On Fri, 20 Mar 2009 18:27:46 -0700 > "Paul E. McKenney" wrote: > > > > I've seen only this (input) one to take a long time > > > > Ouch!!! A -single- synchronize_rcu() taking a full second??? That > > indicates breakage. > > I'll do a debug mode tomorrow and visualize it as part of the bootgraph; > hopefully it'll be an interesting result. > I'll share the graph when I have it.... Looking forward to seeing it!!! 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/