Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751412AbdIEHeW (ORCPT ); Tue, 5 Sep 2017 03:34:22 -0400 Received: from ud10.udmedia.de ([194.117.254.50]:58270 "EHLO mail.ud10.udmedia.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751141AbdIEHeV (ORCPT ); Tue, 5 Sep 2017 03:34:21 -0400 X-Greylist: delayed 400 seconds by postgrey-1.27 at vger.kernel.org; Tue, 05 Sep 2017 03:34:21 EDT Date: Tue, 5 Sep 2017 09:27:38 +0200 From: Markus Trippelsdorf To: linux-kernel@vger.kernel.org Cc: Thomas Gleixner , Ingo Molnar , Peter Zijlstra Subject: Current mainline git (24e700e291d52bd2) hangs when building e.g. perf Message-ID: <20170905072738.GA277@x4> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 372 Lines: 11 Current mainline git (24e700e291d52bd2) hangs when building software concurrently (for example perf). The issue is not 100% reproducible (sometimes building perf succeeds), so bisecting will not work. Magic SysRq key doesn't work and there is nothing in the logs. Enabling CONFIG_PROVE_LOCKING makes the issue go away. Any ideas on how to debug this further? -- Markus