linux-kernel - Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug

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Message-ID: <20171221164221.GA23680@wolff.to>
Date:   Thu, 21 Dec 2017 10:42:21 -0600
From:   Bruno Wolff III <bruno@...ff.to>
To:     weiping zhang <zwp10758@...il.com>
Cc:     Laura Abbott <labbott@...hat.com>, Jan Kara <jack@...e.cz>,
        Jens Axboe <axboe@...nel.dk>, linux-mm@...ck.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        regressions@...mhuis.info,
        weiping zhang <zhangweiping@...ichuxing.com>,
        linux-block@...r.kernel.org
Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for
 bdi_debug_register")

On Thu, Dec 21, 2017 at 23:48:19 +0800,
  weiping zhang <zwp10758@...il.com> 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.