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 DE336C04EB8 for ; Mon, 10 Dec 2018 05:46:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 901B020821 for ; Mon, 10 Dec 2018 05:46:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="OF8FsOnk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 901B020821 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 S1726459AbeLJFq1 (ORCPT ); Mon, 10 Dec 2018 00:46:27 -0500 Received: from mail-pl1-f179.google.com ([209.85.214.179]:46633 "EHLO mail-pl1-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726100AbeLJFq1 (ORCPT ); Mon, 10 Dec 2018 00:46:27 -0500 Received: by mail-pl1-f179.google.com with SMTP id t13so4691604ply.13 for ; Sun, 09 Dec 2018 21:46:27 -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=23+9ug+dFHS69gqg3+qO7txAJ1pBcynL5Z/20oRtL5M=; b=OF8FsOnklLFzvDTUTUENVZY5Aoh4rxQKFFrjqgydCL5lnhI6o6Hc1Zi1PtdRwpxSTW qezrYhUb0ifCemaKidqrsPiWWsFV5Mf/Z+HlxOrBRnw+h5EbCuC23rzcTS8B3y4HI9gU LtFpk1yLwJzhyeSAdjIv45P3STdHbas8bxWMds+6VB5vWmDqKxdzK2+BCerVEHSJnrn+ EYcgIeElXhwNR6aOpsxn9Kc6XAWNtV5XDG2Mnk6QlBiK5UmHAFFQjqatgSuDfGO1LR5k 4KD92YUzw9X1WuxugI82lej+UtDxU69nFt0t2/kCVG+HSUi8x9uDV4xHFKULVO57cmiD ui8w== 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=23+9ug+dFHS69gqg3+qO7txAJ1pBcynL5Z/20oRtL5M=; b=OmlVKM575X8XOLSdoFvEjTB/kQW7p4Xe3XiPpq1vzpHKs7CFwemTUuxKxlzEwMW8CJ srgBSuFT8H/smeIG7Lx5k2rmMFhmlxz6Pumzpr3GDEXv/ZLt4FRWXRAyvt1bfyW6/zF1 OcVcB0IENpfumOhjFVT6ArJmYBQYA3IHbqNCTjnpfzGuO61tzWmOWZlls3zzjQEt6ddc Chiv2YiyfG89ZqOOHgZRpop9z7cubdHUvb0FKi3S03m50h6nPOhEm4yPyizcuvynMeAy l5RSlZ4fgDWs8A15PWk2OAsWBZ7xoUtgOJwgOUqIitcZOdleAv8r/2vBhKTe9FaiUsaO 7fpg== X-Gm-Message-State: AA+aEWaXkPezf/xsgtrXiaXXlr9jvR/zf0VpApMTUG+21R6OwoAyLAV1 RQLW98sehNf5M4jB8NJ5u3U= X-Google-Smtp-Source: AFSGD/VzDD5gcicp6VFc1MJQ8yMBb3VYMc6iQumlYvMPjDSGpwkIZ4xmkfFu+fFEx1xYkkZJPb6ycQ== X-Received: by 2002:a17:902:b7c7:: with SMTP id v7mr10988614plz.75.1544420786740; Sun, 09 Dec 2018 21:46:26 -0800 (PST) Received: from localhost ([175.223.21.78]) by smtp.gmail.com with ESMTPSA id t12sm16143835pfi.45.2018.12.09.21.46.25 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 09 Dec 2018 21:46:25 -0800 (PST) Date: Mon, 10 Dec 2018 14:46:22 +0900 From: Sergey Senozhatsky To: "Liu, Chuansheng" Cc: "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: <20181210054622.GA6291@jagdpanzerIV> References: <27240C0AC20F114CBF8149A2696CBE4A6015A889@SHSMSX101.ccr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <27240C0AC20F114CBF8149A2696CBE4A6015A889@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 05:40), 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()? -ss