From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f197.google.com (mail-wr0-f197.google.com [209.85.128.197]) by kanga.kvack.org (Postfix) with ESMTP id 30BC66B0033 for ; Thu, 21 Dec 2017 12:46:03 -0500 (EST) Received: by mail-wr0-f197.google.com with SMTP id n21so8164735wrb.11 for ; Thu, 21 Dec 2017 09:46:03 -0800 (PST) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id g44sor10999531eda.28.2017.12.21.09.46.01 for (Google Transport Security); Thu, 21 Dec 2017 09:46:01 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <14f04d43-728a-953f-e07c-e7f9d5e3392d@kernel.dk> References: <20171221130057.GA26743@wolff.to> <20171221151843.GA453@wolff.to> <20171221153631.GA2300@wolff.to> <20171221164221.GA23680@wolff.to> <14f04d43-728a-953f-e07c-e7f9d5e3392d@kernel.dk> From: weiping zhang Date: Fri, 22 Dec 2017 01:46:00 +0800 Message-ID: Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register") Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: Jens Axboe Cc: Bruno Wolff III , Laura Abbott , Jan Kara , linux-mm@kvack.org, Linux Kernel Mailing List , regressions@leemhuis.info, weiping zhang , linux-block@vger.kernel.org 2017-12-22 1:02 GMT+08:00 Jens Axboe : > On 12/21/17 9:42 AM, Bruno Wolff III wrote: >> On Thu, Dec 21, 2017 at 23:48:19 +0800, >> weiping zhang wrote: >>>> output you want. I never saw it for any kernels I compiled myself. Only when >>>> I test kernels built by Fedora do I see it. >>> see it every boot ? >> >> I don't look every boot. The warning gets scrolled of the screen. Once I see >> the CPU hang warnings I know the boot is failing. I don't always look >> at journalctl later to see what's there. > > I'm going to revert a0747a859ef6 for now, since we're now 8 days into this > and no progress has been made on fixing it. > OK, you can revert it first. it seems MD produce a duplicated major:minor pair, which lead to create debugfs dir failed, but it's under debugging... > -- 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