Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register")

From: weiping zhang
Date: Thu Dec 21 2017 - 12:46:10 EST

2017-12-22 1:02 GMT+08:00 Jens Axboe <axboe@xxxxxxxxx>:
> On 12/21/17 9:42 AM, Bruno Wolff III wrote:
>> On Thu, Dec 21, 2017 at 23:48:19 +0800,
>> weiping zhang <zwp10758@xxxxxxxxx> wrote:
>>>> 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 don't look every boot. The warning gets scrolled of the screen. Once I see
>> the CPU hang warnings I know the boot is failing. I don't always look
>> at journalctl later to see what's there.
> I'm going to revert a0747a859ef6 for now, since we're now 8 days into this
> and no progress has been made on fixing it.
OK, you can revert it first.
it seems MD produce a duplicated major:minor pair, which lead to create
debugfs dir failed, but it's under debugging...