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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 5B12FCA9EAF for ; Mon, 21 Oct 2019 12:45:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2F0C120873 for ; Mon, 21 Oct 2019 12:45:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="q46UganW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728925AbfJUMpZ (ORCPT ); Mon, 21 Oct 2019 08:45:25 -0400 Received: from merlin.infradead.org ([205.233.59.134]:55922 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728081AbfJUMpY (ORCPT ); Mon, 21 Oct 2019 08:45:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=8npHG7xyZSoSEqzIUQXIFsHT1fl+7N1HJk4jdM+fJxY=; b=q46UganW/nhMIxuKjruzGMf3K 4Zis/viOhlxuBseSQJTpgaVbBrYbf6Tkt5BaxjYgVbfJ2+I0hglzi3ZzKc/SqvvhWLoaVt6s08Ye8 X9raUG5SeB3x8BXqgb5ouAx836kQX5KfEALvKo2dRIvH0Affp1pJkBVg6ks8uQ3XpVeAWDB3JJ9oI l1BxqZS9GxCfoNwTKAwTHeeSE+U29jYXOSio4Hjk8OMkAfYt5BErwyGvhdeE35YtjIUFF7IuUTH/Y gkmopnc4EDqzcHxVSIqvhPzMZvfaHJu51Ntz2SC6ULaS0cMdhL7Xc4ExztvSQy+ViWGn4jBR/AkYh NmDfCsTOg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMX3o-0004Yg-7i; Mon, 21 Oct 2019 12:45:20 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id D863530702E; Mon, 21 Oct 2019 14:44:21 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 06ADA2022BA17; Mon, 21 Oct 2019 14:45:19 +0200 (CEST) Date: Mon, 21 Oct 2019 14:45:18 +0200 From: Peter Zijlstra To: Petr Mladek Cc: Thomas Gleixner , Ingo Molnar , Laurence Oberman , Vincent Whitchurch , Michal Hocko , linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/3] Test softlockup Message-ID: <20191021124518.GF1817@hirez.programming.kicks-ass.net> References: <20190819104732.20966-1-pmladek@suse.com> <20190819104732.20966-4-pmladek@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190819104732.20966-4-pmladek@suse.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 19, 2019 at 12:47:32PM +0200, Petr Mladek wrote: > Trigger busy loop by: > $> cat /proc/version > > Stop the busy loop by: > $> cat /proc/consoles > > The code also shows the first touch*watchdog() function that hides > softlockup on a "well known" location. This seems like a terrible interface...