linux-kernel - Re: blk_mq_register_disk: kobject (00000000009f2dd8): tried to init an initialized object, something is seriously wrong.

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Date:	Tue, 22 Sep 2015 11:35:50 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Meelis Roos <mroos@...ux.ee>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	sparclinux@...r.kernel.org, Akinobu Mita <akinobu.mita@...il.com>
Subject: Re: blk_mq_register_disk: kobject (00000000009f2dd8): tried to init
 an initialized object, something is seriously wrong.

On Mon, Sep 21, 2015 at 7:43 PM, Meelis Roos <mroos@...ux.ee> wrote:
>
>
> Yes, sorry - I applied the last chunk by hand because it was mangled by
> the web UI, and added ti to a wrong struct.
>
> Now I tested it on top of 4.3.0-rc1. COmpiles, rebooted fine 6 times,
> but now it hangs again, seems to be the same message:
>
> [  107.143910] kobject (00000000009f2dd8): tried to init an initialized object, something is seriously wrong.

Looks a bit odd since blk_mq_register_disk is run only once per device,
could you apply the attached debug patch and post the boot log when the
warning is triggered?

Thanks,

View attachment "blk-mq-kobj-init.patch" of type "text/x-patch" (784 bytes)