From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966150AbdLSBGT (ORCPT ); Mon, 18 Dec 2017 20:06:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:56420 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935486AbdLSBGP (ORCPT ); Mon, 18 Dec 2017 20:06:15 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4765821879 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=rostedt@goodmis.org Date: Mon, 18 Dec 2017 20:06:12 -0500 From: Steven Rostedt To: Grygorii Strashko Cc: linux-rt-users , LKML , Sebastian Andrzej Siewior , Sekhar Nori Subject: Re: [v4.9-rt][report] stress-ng: possible circular locking dependency detected Message-ID: <20171218200612.7dce6787@gandalf.local.home> In-Reply-To: References: X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; 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 List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 18 Dec 2017 18:55:24 -0600 Grygorii Strashko wrote: > Hi All, > > I've tried to run stress-ng on TI am57xx-evm (SMP, 2 cpu) and caught 2 "INFO: possible circular locking dependency detected" > > Command 1 (log 1): > ## stress-ng --class cpu --all 0 -t 5m & stress-ng --class memory --all 0 --vm-bytes 90% -t 5m > > Command 2 (log 2): > ## stress-ng --class os --all 0 -t 5m > > actually command 2 often stuck or crushes (Log3 - I've collected 3 different dumps) > I hate to tell you but CPU hotplug is known to be broken on 4.9-rt and earlier. Hopefully the v4.14-rt code with the redesigned hotplug work fixes all this. -- Steve