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

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Message-ID: <CAA70yB7wL_Wq5S8XQ9zHuLPDdwepv7dYdKALL8Sg0q6CNdAz5g@mail.gmail.com>
Date:   Sun, 17 Dec 2017 21:43:50 +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, linux-block@...r.kernel.org
Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register")

2017-12-17 0:32 GMT+08:00 Bruno Wolff III <bruno@...ff.to>:
> On Fri, Dec 15, 2017 at 13:51:22 -0600,
>  Bruno Wolff III <bruno@...ff.to> wrote:
>>
>>
>> I do not know what is different. Do you have any ideas? Most likely I
>> won't be able to test any more kernels until Monday (unless I can use most
>> of my most recent build over again very soon).
>
>
> The .config looks like it should be OK. I'll test setting loglevel on boot
> in case the default is different than what the config file says. I can't do
> that until Monday morning.
>
> I think it is more likely the the WARN_ON macro code isn't being compiled in
> for some reason. I haven't confirmed that, nor have I found anything that
> would leave that code out when I do a make, but include it during Fedora
> builds.
Hi, thanks for testing, I think you first reproduce this issue(got WARNING
at device_add_disk) by your own build, then add my debug patch.