From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754127AbbCINpt (ORCPT ); Mon, 9 Mar 2015 09:45:49 -0400 Received: from www.linutronix.de ([62.245.132.108]:35476 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753980AbbCINph (ORCPT ); Mon, 9 Mar 2015 09:45:37 -0400 Date: Mon, 9 Mar 2015 14:45:35 +0100 From: Sebastian Andrzej Siewior To: Mike Galbraith Cc: linux-rt-users , LKML , Thomas Gleixner , rostedt@goodmis.org, John Kacur Subject: Re: [patch-3.18.7-rt1] sched/context-tracking: fix PREEMPT_LAZY explosions Message-ID: <20150309134535.GA13768@linutronix.de> References: <20150216111822.GA21649@linutronix.de> <1424258514.3819.39.camel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1424258514.3819.39.camel@gmail.com> X-Key-Id: 2A8CF5D1 X-Key-Fingerprint: 6425 4695 FFF0 AA44 66CC 19E6 7B96 E816 2A8C F5D1 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Mike Galbraith | 2015-02-18 12:21:54 [+0100]: >On Mon, 2015-02-16 at 12:18 +0100, Sebastian Andrzej Siewior wrote: > >> Known issues: >> >> - lazy preempt on x86_64 leads to a crash with some load. > >The below still works for me. (it doesn't make nohz_full actually work >in rt, but at least folks who want to tinker with it can do so) So your box still crashes without it? The thing is I tried to reproduce it and it does not occur anymore. Neither in KVM nor on real HW. Sebastian