From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755497AbbCFPrT (ORCPT ); Fri, 6 Mar 2015 10:47:19 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:35206 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754220AbbCFPrR (ORCPT ); Fri, 6 Mar 2015 10:47:17 -0500 Message-ID: <54F9CBD6.1030300@oracle.com> Date: Fri, 06 Mar 2015 10:46:30 -0500 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Rafael David Tinoco , Ingo Molnar CC: Peter Zijlstra , LKML , Dave Jones , Davidlohr Bueso , jason.low2@hp.com, Linus Torvalds Subject: Re: sched: softlockups in multi_cpu_stop References: <54F41516.6060608@oracle.com> <54F98F1F.3080107@oracle.com> <20150306123233.GA9972@gmail.com> <54F9BD90.60301@oracle.com> In-Reply-To: <54F9BD90.60301@oracle.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/06/2015 09:45 AM, Sasha Levin wrote: > On 03/06/2015 09:34 AM, Rafael David Tinoco wrote: >> Are you sure about this ? I have a core dump locked on the same place >> (state machine for powering cpu down for the task swap) from a 3.13 (+ >> upstream patches) and this commit wasn't backported yet. > > bisect took me to that same commit twice, and I'm running a -next with that > commit reverted and not seeing those hangs anymore. > > I also didn't see the hang up until a month or so ago (which matches with that > commit date), and definitely not back in 3.13. I just remembered that I was seeing something similar back then, which was fixed: http://lists.openwall.net/linux-kernel/2014/05/12/725 Thanks, Sasha