From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933176AbcGLMfl (ORCPT ); Tue, 12 Jul 2016 08:35:41 -0400 Received: from cloudserver094114.home.net.pl ([79.96.170.134]:54128 "HELO cloudserver094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750943AbcGLMfj (ORCPT ); Tue, 12 Jul 2016 08:35:39 -0400 From: "Rafael J. Wysocki" To: Meelis Roos Cc: Linux Kernel list , linux-pm@vger.kernel.org, Len Brown Subject: Re: 4.7-rc6: NMI in intel_idle on HP Proliant G6 Date: Tue, 12 Jul 2016 14:40:23 +0200 Message-ID: <5630546.0MIYeGNSYG@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/4.5.0-rc1+; KDE/4.11.5; x86_64; ; ) In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday, July 12, 2016 03:27:19 PM Meelis Roos wrote: > > On HP Proliant DL360 G6, Debian unstable 4.6 kernel runs fine but > > selfcompiled 4.7-rc6 and 4.7-rc7 sometimes crash with NMI from > > intel_idle. Sometimes it boots fine. With intel_idle disabled, it has > > booted successful so far in 2 tries, one with rc6 and one with rc7. > > More testing shows it can NMI on acpi_idle too, not just intel_idle. > > > Screenshot with some backtrace: > > http://kodu.ut.ee/~mroos/intel-idle-NMI.png > > http://kodu.ut.ee/~mroos/acpi-idle-NMI.png There were almost no changes in the ACPI idle driver between 4.6 and 4.7-rc, so the reason is somewhere else. Have you tried any earlier 4.7-rc? The only change between 4.6 and now in the ACPI processor stuff at all is this one 86314751c794 ACPI / processor: Avoid reserving IO regions too early so does it help if that's reverted? Otherwise, any chances to bisect? Thanks, Rafael