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Date:   Thu, 21 Dec 2017 23:48:19 +0800
From:   weiping zhang <zwp10758@...il.com>
To:     Bruno Wolff III <bruno@...ff.to>
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")

2017-12-21 23:36 GMT+08:00 Bruno Wolff III <bruno@...ff.to>:
> On Thu, Dec 21, 2017 at 23:31:40 +0800,
>  weiping zhang <zwp10758@...il.com> wrote:
>>
>> does every time boot fail can trigger WANRING in device_add_disk ?
>
>
> Not that I see. But the message could scroll off the screen. The boot gets
> far enough that systemd copies over dmesg output to permanent storage that I
> can see on my next successful boot. That's where I looked for the warning
> 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 just tried booting to single user and the boot still hangs.
>
> When I build the kernels, the compiler options are probably a bit different
> than when Fedora does. That might affect what happens during boot.

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