linux-kernel - Re: Crash in msm serial on dragonboard with ftrace bootargs

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Date:   Wed, 17 Oct 2018 22:33:34 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Cc:     Stephen Boyd <sboyd@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Jiri Slaby <jslaby@...e.com>,
        Kees Cook <keescook@...omium.org>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Geliang Tang <geliangtang@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pramod Gurav <gpramod@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Sibi Sankar <sibis@...eaurora.org>
Subject: Re: Crash in msm serial on dragonboard with ftrace bootargs

On Wed, 17 Oct 2018 00:36:05 +0530
Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org> wrote:

> On 10/17/2018 12:33 AM, Steven Rostedt wrote:
> > On Wed, 17 Oct 2018 00:31:03 +0530
> > Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org> wrote:
> >   
> >> 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.  
> > 
> > So there's more than one problem area.
> > 
> > What about ftrace_notrace=m*
> > 
> > ?
> >   
> 
> That too crashes.
> 

So something else is causing an issue besides just msm_read.

Can you do an objdump -dr of the entire vmlinux binary and gzip it and
post it somewhere. Not sure if it would be too big to email. You could
try sending it to me privately. I'd like to see the binary that you are
using.

-- Steve