From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758104Ab2IEDvJ (ORCPT ); Tue, 4 Sep 2012 23:51:09 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:34836 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751263Ab2IEDvG (ORCPT ); Tue, 4 Sep 2012 23:51:06 -0400 Date: Wed, 5 Sep 2012 11:51:10 +0800 From: Shawn Guo To: Subodh Nijsure Cc: paulmck@linux.vnet.ibm.com, linux-mtd@lists.infradead.org, Linux Kernel Maling List , linux-arm-kernel@lists.infradead.org, Artem Bityutskiy Subject: Re: RCU warning during UBI file system mount Message-ID: <20120905035108.GV2362@S2101-09.ap.freescale.net> References: <5042EC5D.1010207@grid-net.com> <1346744796.12610.6.camel@sauron.fi.intel.com> <20120904144813.GC2593@linux.vnet.ibm.com> <50462190.7090702@grid-net.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50462190.7090702@grid-net.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 04, 2012 at 08:43:12AM -0700, Subodh Nijsure wrote: > MX28 is ARM device. I removed following from my config and these > warnings went away. > > CONFIG_CPU_IDLE=y > CONFIG_CPU_IDLE_GOV_LADDER=y > CONFIG_CPU_IDLE_GOV_MENU=y > There is no cpuidle implemented on imx28. I do not understand how these options influence the result here. > I have attached the kernel configuration file I used. > > It doesn't affect specific hw I am working with as device is not > required to enter idle mode. > I am Cc-ing linux-arm folks, in case someone on arm platform > requires CPU idele &, RCU to work. > I just ran a case with CONFIG_CPU_IDLE and RCU support and failed to reproduce the warning. Is this something specific to gpmi-nand or we can see it with any other imx28 drivers/cases? Sorry, I do not have NAND flash set up on my imx28 board. -- Regards, Shawn