From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753411AbdIDHzK (ORCPT ); Mon, 4 Sep 2017 03:55:10 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:35713 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753260AbdIDHzI (ORCPT ); Mon, 4 Sep 2017 03:55:08 -0400 Date: Mon, 4 Sep 2017 09:55:02 +0200 From: Peter Zijlstra To: Mike Galbraith Cc: LKML , Thomas Gleixner , Byungchul Park Subject: Re: hotplug lockdep splat (tip) Message-ID: <20170904075502.74pgfd2twdfklspw@hirez.programming.kicks-ass.net> References: <1504350596.16793.44.camel@gmx.de> <1504421975.30792.32.camel@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1504421975.30792.32.camel@gmx.de> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 03, 2017 at 08:59:35AM +0200, Mike Galbraith wrote: > > [ 126.626908] Unregister pv shared memory for cpu 1 > [ 126.631041] > [ 126.631269] ====================================================== > [ 126.632442] WARNING: possible circular locking dependency detected > [ 126.633599] 4.13.0.g06260ca-tip-lockdep #2 Tainted: G E > [ 126.634380] ------------------------------------------------------ > [ 126.635124] stress-cpu-hotp/3156 is trying to acquire lock: > [ 126.635804] ((complete)&st->done){+.+.}, at: [] takedown_cpu+0x8a/0xf0 > [ 126.636809] > [ 126.636809] but task is already holding lock: > [ 126.637567] (sparse_irq_lock){+.+.}, at: [] irq_lock_sparse+0x17/0x20 > [ 126.638665] https://lkml.kernel.org/r/20170829193416.GC32112@worktop.programming.kicks-ass.net I still need to write a coherent Changelog and comments for that :/