From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sai Prakash Ranjan Subject: Re: Crash in msm serial on dragonboard with ftrace bootargs Date: Wed, 17 Oct 2018 00:31:03 +0530 Message-ID: <7781815e-cba2-9e36-db6d-268298747876@codeaurora.org> References: <1cae8f10-55f5-20ce-9105-30af6f88bd6e@codeaurora.org> <20181016112928.4b52afb5@gandalf.local.home> <8c2fb318-813d-81f1-1e2f-cdbc68353077@codeaurora.org> <20181016125721.236ada82@gandalf.local.home> <20181016134803.1b9260c1@gandalf.local.home> <472db11e-49a6-a1ee-e298-791ee1bbb10b@codeaurora.org> <20181016141610.639b9000@gandalf.local.home> <20181016144123.24c47b38@gandalf.local.home> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20181016144123.24c47b38@gandalf.local.home> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Steven Rostedt Cc: Stephen Boyd , Bjorn Andersson , Andy Gross , David Brown , Jiri Slaby , Kees Cook , "Joel Fernandes (Google)" , Geliang Tang , Greg Kroah-Hartman , Pramod Gurav , linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Rajendra Nayak , Vivek Gautam , Sibi Sankar List-Id: linux-serial@vger.kernel.org On 10/17/2018 12:11 AM, Steven Rostedt wrote: > On Tue, 16 Oct 2018 23:55:14 +0530 > Sai Prakash Ranjan wrote: > >> On 10/16/2018 11:46 PM, Steven Rostedt wrote: >>> >>> [ Removed ivan.ivanov@linaro.org due to getting mail delivery errors ] >>> >>> On Tue, 16 Oct 2018 23:35:00 +0530 >>> Sai Prakash Ranjan wrote: >>> >>>> Ok got it, this sounds fun. I'll give it a try. >>> >>> Awesome, I'm looking forward to seeing what you come up with. >>> >> >> Now, I can trigger this crash reboot with "ftrace=function >> ftrace_filter=f*,g*,h*,i*,j*,k*,l*,m*,n*,o*,p*,q*" > > Does it crash with just "f*" or "g*" or any singularity of the above? > > Hmm, I wonder if it is from tracing msm_read? > Haa seems like you are right! With "ftrace=function ftrace_filter=msm_read" , I can trigger the crash, but sadly "ftrace_notrace=msm_read" also crashes. -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation