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

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Date:   Tue, 19 Dec 2017 18:20:20 -0600
From:   Bruno Wolff III <bruno@...ff.to>
To:     Shaohua Li <shli@...nel.org>
Cc:     weiping zhang <zwp10758@...il.com>,
        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, linux-block@...r.kernel.org
Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for
 bdi_debug_register")

On Tue, Dec 19, 2017 at 10:24:52 -0800,
  Shaohua Li <shli@...nel.org> wrote:
>
>Not sure if this is MD related, but could you please check if this debug patch
>changes anything?

The system still had cpu hangs. I've attached dmesg output saved by systemd 
and retrieved after booting with a pre-rc2 kernel.

View attachment "boot11.log" of type "text/plain" (149033 bytes)