From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-it0-f69.google.com (mail-it0-f69.google.com [209.85.214.69]) by kanga.kvack.org (Postfix) with ESMTP id 5BBD96B0038 for ; Fri, 15 Dec 2017 06:14:01 -0500 (EST) Received: by mail-it0-f69.google.com with SMTP id g69so14047173ita.9 for ; Fri, 15 Dec 2017 03:14:01 -0800 (PST) Received: from wolff.to (wolff.to. [98.103.208.27]) by mx.google.com with SMTP id m9si4862117iti.119.2017.12.15.03.14.00 for ; Fri, 15 Dec 2017 03:14:00 -0800 (PST) Date: Fri, 15 Dec 2017 05:10:50 -0600 From: Bruno Wolff III Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register") Message-ID: <20171215111050.GA30737@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: Sender: owner-linux-mm@kvack.org List-ID: 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 On Fri, Dec 15, 2017 at 10:04:32 +0800, weiping zhang wrote: >I just want to know WARN_ON WHAT in device_add_disk, >if bdi_register_owner return error code, it may fail at any step of following: Was that output in the original boot log? I didn't see anything there that had the string WARN_ON. The first log was from a Fedora kernel. The second from a kernel I built. I used a Fedora config though. The config was probably from one of their nodebug kernels, I could build another one using a config from a debug kernel. Would that likely provide what you are looking for? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org