From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 497D9C28CF6 for ; Wed, 1 Aug 2018 07:22:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 09BB220841 for ; Wed, 1 Aug 2018 07:22:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 09BB220841 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387484AbeHAJGp (ORCPT ); Wed, 1 Aug 2018 05:06:45 -0400 Received: from foss.arm.com ([217.140.101.70]:36164 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732300AbeHAJGo (ORCPT ); Wed, 1 Aug 2018 05:06:44 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9ACBCED1; Wed, 1 Aug 2018 00:22:28 -0700 (PDT) Received: from big-swifty.misterjones.org (big-swifty.copenhagen.arm.com [10.32.148.139]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 260D53F2EA; Wed, 1 Aug 2018 00:22:23 -0700 (PDT) Date: Wed, 01 Aug 2018 08:22:17 +0100 Message-ID: <864lgey2ja.wl-marc.zyngier@arm.com> From: Marc Zyngier To: Mike Galbraith Cc: Sebastian Andrzej Siewior , Thomas Gleixner , LKML , linux-rt-users , Steven Rostedt Subject: Re: bisected - arm64 kvm unit test failures In-Reply-To: <1533103345.4735.19.camel@gmx.de> References: <20180727215710.zq6gkoqzlb4ca7qv@linutronix.de> <1532768831.9882.71.camel@gmx.de> <1532847330.1618.8.camel@gmx.de> <1532864867.1618.32.camel@gmx.de> <1532967899.30205.62.camel@gmx.de> <1533061729.12487.26.camel@gmx.de> <867elay7he.wl-marc.zyngier@arm.com> <1533103345.4735.19.camel@gmx.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 EasyPG/1.0.0 Emacs/25.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Organization: ARM Ltd MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 01 Aug 2018 07:02:25 +0100, Mike Galbraith wrote: > > [1 ] > On Wed, 2018-08-01 at 06:35 +0100, Marc Zyngier wrote: > > > > Is it something that is reproducible with the current mainline (non-RT)? > > These waters are a bit muddy, it's config dependent. I'm trying to > generate a reproducing !RT config for -rc7 as we speak. If I build > openSUSE/master-default, it does NOT reproduce. That with the bisect > config just finished building, and.... yup, it reproduced > (attached). Thanks for that. > > Every RT tree 4.16..master.today reproduces, and is fixed up (modulo > the RT specific failure) by reverting the fingered commit. > > > Pretty worrying. What HW is that on? > > Box is a 4 node/64 core TaiShan 2280. Is that what is also known as D05/HIP07, with 64 Cortex-A72? If so, I think we have one somewhere... I'll try to reproduce it once I'm back into the office (things seem to run just fine on my A72-based laptop, so it definitely smells of being config dependent). Cheers, M. -- Jazz is not dead, it just smell funny.