From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Shi Subject: Re: RCU stall on panda Date: Fri, 16 May 2014 15:41:57 +0800 Message-ID: <5375C145.6070904@linaro.org> References: <53675C5F.10509@linaro.org> <20140505180617.GM8754@linux.vnet.ibm.com> <20140512212102.GF5668@atomide.com> <5371BD69.8010600@linaro.org> <20140513153220.GC16837@atomide.com> <53747E6D.60500@linaro.org> <53748371.5030704@linaro.org> <5374C07C.1070400@linaro.org> <20140515183247.GF23659@atomide.com> <5375091D.3010607@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pb0-f46.google.com ([209.85.160.46]:46647 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755345AbaEPHmC (ORCPT ); Fri, 16 May 2014 03:42:02 -0400 Received: by mail-pb0-f46.google.com with SMTP id rq2so2250873pbb.19 for ; Fri, 16 May 2014 00:42:01 -0700 (PDT) In-Reply-To: <5375091D.3010607@ti.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Santosh Shilimkar , Tony Lindgren Cc: Daniel Lezcano , "Paul E. McKenney" , "naresh.kamboju@linaro.org Kamboju" , Linaro Kernel , LAK , Mark Brown , linux-omap@vger.kernel.org On 05/16/2014 02:36 AM, Santosh Shilimkar wrote: >>> >> yes. >>> >> My board is panda ES. without this revert, it works. >> > >> > Care to specify what linux version you are testing against? >> > >> > Does it hang in idle always immediately on booting? >> > >> > Or does the serial console first hang with sysrq still >> > working (ctrl-a h in minicom for help) with device >> > eventually locking up hard? >> > > I just posted an updated patch Alex on other thread. > Attaching here again for your reference. Please try > it out and see if the you still get a hang. it does not hang this time. but I am not sure it can solve my problem, since RCU stall is not easy to reproduce in short time. -- Thanks Alex