From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1752206AbcGKTm6 (ORCPT <rfc822;w@1wt.eu>);
	Mon, 11 Jul 2016 15:42:58 -0400
Received: from mail-pa0-f54.google.com ([209.85.220.54]:34953 "EHLO
	mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751051AbcGKTm4 (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 11 Jul 2016 15:42:56 -0400
From: Jens Axboe <axboe@kernel.dk>
Subject: Regression in 4.7-rc7
To: lv.zheng@intel.com, LKML <linux-kernel@vger.kernel.org>
Message-ID: <5783F6BE.6090208@kernel.dk>
Date: Mon, 11 Jul 2016 12:42:54 -0700
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
 Thunderbird/38.8.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi,

Updated the laptop to -rc7 this morning, and it fails to boot. After 
bisecting it, this is the culprit:

commit 45209046c47b93fadf26dc59a9da724f387b9cf2
Author: Lv Zheng <lv.zheng@intel.com>
Date:   Tue Jul 5 13:53:12 2016 +0800

     ACPICA: Namespace: Fix namespace/interpreter lock ordering

     There is a lock order issue in acpi_load_tables(). The namespace lock
     is held before holding the interpreter lock.

The last I see is grub loading initramfs, after that nothing. Very 
reproducible. Laptop is a Dell XPS 13.

-- 
Jens Axboe