From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Rostedt Subject: Re: S3 resume regression [1cf4f629d9d2 ("cpu/hotplug: Move online calls to hotplugged cpu")] Date: Wed, 11 May 2016 08:44:45 -0400 Message-ID: <20160511084445.00030b49@gandalf.local.home> References: <20160511101920.GZ4329@intel.com> <57332171.8070403@linutronix.de> <20160511122116.GA4329@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from smtprelay0095.hostedemail.com ([216.40.44.95]:37596 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751611AbcEKMou convert rfc822-to-8bit (ORCPT ); Wed, 11 May 2016 08:44:50 -0400 In-Reply-To: <20160511122116.GA4329@intel.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Ville =?UTF-8?B?U3lyasOkbMOk?= Cc: Sebastian Andrzej Siewior , Thomas Gleixner , linux-arch@vger.kernel.org, Rik van Riel , Rafael Wysocki , "Srivatsa S. Bhat" , Peter Zijlstra , Arjan van de Ven , Rusty Russell , Oleg Nesterov , Tejun Heo , Andrew Morton , Paul McKenney , Linus Torvalds , Paul Turner , linux-kernel@vger.kernel.org, rui.zhang@intel.com, len.brown@intel.com On Wed, 11 May 2016 15:21:16 +0300 Ville Syrj=C3=A4l=C3=A4 wrote: > Yeah can't get anything from the machine at that point. netconsole > didn't help either, and no serial on this machine. And IIRC I've > tried ramoops on this thing in the past but unfortunately the memory > got cleared on reboot. >=20 Can you look at the documentation in the kernel code at Documentation/power/basic-pm-debugging.txt And follow the procedures for testing suspend to RAM (although it requires mostly running the same tests as for hibernation suspending). You can also use the tool s2ram for this as well. See Documentation/power/s2ram.txt Perhaps this can give us a bit more light onto the problem. Basically the above does partial suspend and resume, and can pinpoint problem areas down to a more select location. Thanks! -- Steve