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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH 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 3BB27C28CF6 for ; Fri, 3 Aug 2018 07:35:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E54D02172B for ; Fri, 3 Aug 2018 07:35:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="AuO6g59F" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E54D02172B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.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 S1732230AbeHCJ37 (ORCPT ); Fri, 3 Aug 2018 05:29:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:58116 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727101AbeHCJ37 (ORCPT ); Fri, 3 Aug 2018 05:29:59 -0400 Received: from devbox (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (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 2C0DE2170A; Fri, 3 Aug 2018 07:34:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1533281699; bh=BYxlrVfCro8D/VK0IdCPrJFDEYv/HJGa8yRGUnaV37c=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=AuO6g59Ff0jqK6jdnYZPjs8lKMBB1TXtCn/lvMirCa+4olTy+mSmSlZGTnBR/6SEa Bk/AQte40XmFVLvS1RTyMy9rQhOLKUw2/BRznNqPppturqpLtYb3k7P9jijRECuYtp cX/TyJPjz6Vc6La2tqvdFvFZloPt814B+mIFLQZ0= Date: Fri, 3 Aug 2018 16:34:55 +0900 From: Masami Hiramatsu To: Joel Fernandes Cc: Joel Fernandes , LKML , "Cc: Android Kernel" , Boqun Feng , Byungchul Park , Ingo Molnar , Mathieu Desnoyers , Namhyung Kim , Paul McKenney , Peter Zijlstra , Steven Rostedt , Thomas Glexiner , Tom Zanussi Subject: Re: [PATCH v12 0/3] tracing: Centralize preemptirq tracepoints and unify their usage Message-Id: <20180803163455.9c846c2a674819564517de59@kernel.org> In-Reply-To: References: <20180730222423.196630-1-joel@joelfernandes.org> <20180802235527.ddb0d1837154e3f98571b3b0@kernel.org> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-redhat-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 Thu, 2 Aug 2018 19:57:09 -0700 Joel Fernandes wrote: > Hi Masami, > > On Thu, Aug 2, 2018 at 7:55 AM, Masami Hiramatsu wrote: > > Hi Joel, > > > > I found this caused several issues when testing ftrace. > > > > #1) ftrace boottest (FTRACE_STARTUP_TEST) fails > > This sadly appears to be a real issue. The startup test for > "preemptirqsoff" tracer fails, however it passes for only preemptoff > or only irqsoff. I tested only the last 2 tracers, not the first one, > that's why I didn't catch it. I need to debug this more. I found that this does not always happen, but 4 out of 5 it happens. Thank you, -- Masami Hiramatsu