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Date:   Thu, 21 Dec 2017 10:02:15 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Bruno Wolff III <bruno@...ff.to>,
        weiping zhang <zwp10758@...il.com>
Cc:     Laura Abbott <labbott@...hat.com>, Jan Kara <jack@...e.cz>,
        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 12/21/17 9:42 AM, Bruno Wolff III wrote:
> 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.

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.

-- 
Jens Axboe

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