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Date:   Thu, 21 Dec 2017 22:01:33 +0800
From:   weiping zhang <>
To:     Bruno Wolff III <>
Cc:     Laura Abbott <>, Jan Kara <>,
        Jens Axboe <>,,
        Linux Kernel Mailing List <>,,
        weiping zhang <>,
Subject: Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register")

2017-12-21 21:00 GMT+08:00 Bruno Wolff III <>:
> After today, I won't have physical access to the problem machine until
> January 2nd. So if you guys have any testing suggestions I need them soon if
> they are to get done before my vacation.
> I do plan to try booting to level 1 to see if I can get a login prompt that
> might facilitate testing. The lockups do happen fairly late in the boot
> process. I never get to X, but maybe it will get far enough for a console
> login.
how do you do bisect ?build all kernel commit one by one ?
as you did before:

what kernel source code do you use that occur warning at device_add_disk?
from fedora or any official release ? if so ,could you provide web link?

if you use same kernel source code and same .config, why your own build
Cann't trigger that warning ?

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