Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754848AbdLOCOW (ORCPT ); Thu, 14 Dec 2017 21:14:22 -0500 Received: from wolff.to ([98.103.208.27]:34326 "HELO wolff.to" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754824AbdLOCOS (ORCPT ); Thu, 14 Dec 2017 21:14:18 -0500 Date: Thu, 14 Dec 2017 20:11:11 -0600 From: Bruno Wolff III To: weiping zhang Cc: Laura Abbott , Jan Kara , Jens Axboe , linux-mm@kvack.org, Linux Kernel Mailing List , regressions@leemhuis.info, linux-block@vger.kernel.org Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register") Message-ID: <20171215021111.GA19764@wolff.to> References: <20171214082452.GA16698@wolff.to> <20171214100927.GA26167@localhost.didichuxing.com> <20171214154136.GA12936@wolff.to> <20171215014417.GA17757@wolff.to> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 372 Lines: 9 On Fri, Dec 15, 2017 at 10:04:32 +0800, weiping zhang wrote: > >so I want see the WARN_ON as you paste before, also my DEBUG log will help >to find which step fail. The previous time also journalctl for output, but maybe I used slightly different options. I'll look and see if it is in the journal for the last bad boot. I can do that from home.