linux-kernel - Re: [4.18.0-rc4][bisected a063057d][mpt3sas] WARNING: CPU: 87 PID: 18868 at block/blk-core.c:781 blk_cleanup

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Date:   Mon, 16 Jul 2018 14:00:27 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "abdhalee@...ux.vnet.ibm.com" <abdhalee@...ux.vnet.ibm.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dougmill@...ux.vnet.ibm.com" <dougmill@...ux.vnet.ibm.com>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "sachinp@...ux.vnet.ibm.com" <sachinp@...ux.vnet.ibm.com>,
        "jack@...e.com" <jack@...e.com>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "MPT-FusionLinux.pdl@...adcom.com" <MPT-FusionLinux.pdl@...adcom.com>
Subject: Re: [4.18.0-rc4][bisected a063057d][mpt3sas] WARNING: CPU: 87 PID:
 18868 at block/blk-core.c:781 blk_cleanup_queue+0x20c/0x220

On Mon, 2018-07-16 at 14:23 +0530, Abdul Haleem wrote:
> mpt3sas module unload triggered a warning at block/blk-core.c:781 on a
> powerpc bare-metal running mainline kernel
> 
> WARN_ON_ONCE() was introduced with commit a063057 : block: Fix a race
> between request queue removal and the block cgroup controller

Please check whether the following patch series fixes this regression: [PATCH
v3 0/2] Ensure that a request queue is dissociated from the cgroup controller
(https://www.mail-archive.com/linux-block@vger.kernel.org/msg21897.html).

Thanks,

Bart.