Date: Thu, 21 Dec 2017 17:16:03 -0600
From: Bruno Wolff III <bruno@wolff.to>
To: Jens Axboe <axboe@kernel.dk>
Cc: weiping zhang <zwp10758@gmail.com>, Laura Abbott <labbott@redhat.com>,
        Jan Kara <jack@suse.cz>, linux-mm@kvack.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        regressions@leemhuis.info,
        weiping zhang <zhangweiping@didichuxing.com>,
        linux-block@vger.kernel.org
Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for
 bdi_debug_register")
Message-ID: <20171221231603.GA15702@wolff.to>
References: <b1415a6d-fccd-31d0-ffa2-9b54fa699692@redhat.com>
 <20171221130057.GA26743@wolff.to>
 <CAA70yB6Z=r+zO7E+ZP74jXNk_XM2CggYthAD=TKOdBVsHLLV-w@mail.gmail.com>
 <20171221151843.GA453@wolff.to>
 <CAA70yB496Nuy2FM5idxLZthBwOVbhtsZ4VtXNJ_9mj2cvNC4kA@mail.gmail.com>
 <20171221153631.GA2300@wolff.to>
 <CAA70yB6nD7CiDZUpVPy7cGhi7ooQ5SPkrcXPDKqSYD2ezLrGHA@mail.gmail.com>
 <20171221164221.GA23680@wolff.to>
 <14f04d43-728a-953f-e07c-e7f9d5e3392d@kernel.dk>
 <20171221181531.GA21050@wolff.to>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Disposition: inline
In-Reply-To: <20171221181531.GA21050@wolff.to>
User-Agent: Mutt/1.9.1 (2017-09-22)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 637
Lines: 13

On Thu, Dec 21, 2017 at 12:15:31 -0600,
  Bruno Wolff III <bruno@wolff.to> wrote:
>
>One important thing I have just found is that it looks like the 
>problem only happens when booting in enforcing mode. If I boot in 
>permissive mode it does not happen. My home machines are currently set 
>to boot in permissive mode and I'll test this evening to see if I can 
>reproduce the problem if I change them to enforcing mode. If so I'll 
>be able to do lots of testing during my vacation.

Enforcing mode alone isn't enough as I tested that one one machine at 
home and it didn't trigger the problem. I'll try another machine late 
tonight.