From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC3B4C5ACCC for ; Tue, 16 Oct 2018 19:15:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6E9532087A for ; Tue, 16 Oct 2018 19:15:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6E9532087A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727335AbeJQDHO (ORCPT ); Tue, 16 Oct 2018 23:07:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:42754 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727007AbeJQDHN (ORCPT ); Tue, 16 Oct 2018 23:07:13 -0400 Received: from gandalf.local.home (cpe-66-24-56-78.stny.res.rr.com [66.24.56.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 458A72087A; Tue, 16 Oct 2018 19:15:19 +0000 (UTC) Date: Tue, 16 Oct 2018 15:15:16 -0400 From: Steven Rostedt To: Sai Prakash Ranjan 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 Subject: Re: Crash in msm serial on dragonboard with ftrace bootargs Message-ID: <20181016151516.786b16cc@gandalf.local.home> In-Reply-To: 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> <7781815e-cba2-9e36-db6d-268298747876@codeaurora.org> <20181016150328.3450d718@gandalf.local.home> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 17 Oct 2018 00:36:05 +0530 Sai Prakash Ranjan wrote: > On 10/17/2018 12:33 AM, Steven Rostedt wrote: > > On Wed, 17 Oct 2018 00:31:03 +0530 > > Sai Prakash Ranjan 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. > Which compiler are you using and can you send me your config. I wonder if there's something screwing up with the way ftrace nops are working on this board. A couple things of note, 1) it works fine after boot up. 2) it crashes in the initcall code, so it's not due to ftrace being enabled too early. I'd like to see the full command line as well. I bet if you remove the qcom,msm-uartdm from the command line, and had just ftrace=function, it may also boot fine too. Can you try that? -- Steve