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=-2.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 2AC21C04EB8 for ; Mon, 10 Dec 2018 06:11:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CD61120672 for ; Mon, 10 Dec 2018 06:11:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Bq2D9g6u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CD61120672 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com 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 S1726492AbeLJGL5 (ORCPT ); Mon, 10 Dec 2018 01:11:57 -0500 Received: from mail-pg1-f195.google.com ([209.85.215.195]:46770 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726100AbeLJGL5 (ORCPT ); Mon, 10 Dec 2018 01:11:57 -0500 Received: by mail-pg1-f195.google.com with SMTP id w7so4453532pgp.13 for ; Sun, 09 Dec 2018 22:11:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=rLFdJwDbqeuwAQdpQ7SN1FApwpz0uzVGfQ2EjesI8Qw=; b=Bq2D9g6u+O4lUF3WYvIyXRuGXbjscRQUgz4REDtX+1y+rUZCmjJq73u+B+4kAPLl46 vcy4Tdp4tiQ07Bfk9NYwMTl3hN6gPsuqur7UwFcScFEj15Dxb05N+8lHRO3OW9vC+1cE rciDAH0PkU5WUxTxWFud7H7vjgIOncgVrEY5gCmyIyeAM3fe32m/xbxfRohMv8cFY7KA KeTCSOay7VZtUAR2SiyqffyepWrz0NiUYat3ObFLhcNRPv4ijQcPpYiuC4h4A87yISQR YXQE73aPFfxsZkJDJaNcuiGUf0fiPIV4zQpVwDQMLJB0pctGhyLGGALkze9gDk6pY5wB setw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=rLFdJwDbqeuwAQdpQ7SN1FApwpz0uzVGfQ2EjesI8Qw=; b=Jt3yRY2O9POt7+KvCm76wjJrPElmjjgRonFM4sI8k1yF1B7iNvEgRsV+yZoa4aqqX4 QkBNQJ9yptrdSVTgnpHhk/L+7G7vpos+vIN/MyTvC5r2dV5h89hCvNDAETz5ESztxHKi DfgilNqM0PbeO9xcIgMhf5afYaiM9XO7QXcCdorBm2bO6QYZ805bkyH+Q/24SZluS94f Sz3WMhXwO3fgzFfyLcPkGnCpAQok/VRCjaYR3vQY72JkClaT9xas8RXBHJgsmPnNNjiG UGPyx1GJgP1VeHl+TZTqY9eO6X7MV2pJ5pgvktK79XkqmRyKGYQt2/Kx4FQ8j2XXtAt9 vnxg== X-Gm-Message-State: AA+aEWYxxxYTE7yX0/4hBA5o0Mgo65ku7KOEwdHPBTAQd1fpCXSBEz/S chJs+EMOCQivw0WqUvWdtfxJn3vK X-Google-Smtp-Source: AFSGD/XntxVmo8GPh4iAfySW7FQ7susmj0lO3b97Guyk4H4MqSqOodtcEIPwRLvpzoEydPdvuStyLg== X-Received: by 2002:a65:60c2:: with SMTP id r2mr9897736pgv.393.1544422315557; Sun, 09 Dec 2018 22:11:55 -0800 (PST) Received: from localhost ([175.223.21.78]) by smtp.gmail.com with ESMTPSA id o189sm14218786pfg.117.2018.12.09.22.11.53 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 09 Dec 2018 22:11:54 -0800 (PST) Date: Mon, 10 Dec 2018 15:11:51 +0900 From: Sergey Senozhatsky To: "Liu, Chuansheng" Cc: Sergey Senozhatsky , "akpm@linux-foundation.org" , "pmladek@suse.com" , "sergey.senozhatsky@gmail.com" , "rostedt@goodmis.org" , "dvyukov@google.com" , "penguin-kernel@I-love.SAKURA.ne.jp" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] kernel/hung_task.c: force ignore_loglevel before panic Message-ID: <20181210061151.GA28533@jagdpanzerIV> References: <27240C0AC20F114CBF8149A2696CBE4A6015A889@SHSMSX101.ccr.corp.intel.com> <20181210054622.GA6291@jagdpanzerIV> <27240C0AC20F114CBF8149A2696CBE4A6015A8D9@SHSMSX101.ccr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <27240C0AC20F114CBF8149A2696CBE4A6015A8D9@SHSMSX101.ccr.corp.intel.com> User-Agent: Mutt/1.11.1 (2018-12-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (12/10/18 05:58), Liu, Chuansheng wrote: > > On (12/10/18 05:40), Liu, Chuansheng wrote: > > > @@ -130,6 +130,13 @@ static void check_hung_task(struct task_struct *t, > > unsigned long timeout) > > > init_utsname()->version); > > > pr_err("\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\"" > > > " disables this message.\n"); > > > + /* When sysctl_hung_task_panic is set, we have to force > > > + * ignore_loglevel to get really useful hung task > > > + * information. > > > + */ > > > + if (sysctl_hung_task_panic && !ignore_loglevel) > > > + ignore_loglevel = true; > > > > console_verbose()? > > Thanks Sergey, it is really my need. I will prepare for a new version of patch:) Let's wait for people to take a look at this patch first. -ss