Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756044AbZCUE5h (ORCPT ); Sat, 21 Mar 2009 00:57:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750800AbZCUE52 (ORCPT ); Sat, 21 Mar 2009 00:57:28 -0400 Received: from casper.infradead.org ([85.118.1.10]:42566 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750706AbZCUE51 (ORCPT ); Sat, 21 Mar 2009 00:57:27 -0400 Date: Fri, 20 Mar 2009 21:58:25 -0700 From: Arjan van de Ven To: paulmck@linux.vnet.ibm.com 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: <20090320215825.19b8baae@infradead.org> In-Reply-To: <20090321012746.GM6698@linux.vnet.ibm.com> References: <20090318215812.15496a86@infradead.org> <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> Organization: Intel X-Mailer: Claws Mail 3.7.0 (GTK+ 2.14.7; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 792 Lines: 23 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.... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- 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/