linux-kernel - Re: [next-20210827][ppc][multipathd] INFO: task hung in dm_table_add

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Date:   Tue, 28 Sep 2021 15:53:47 +0530
From:   Abdul Haleem <abdhalee@...ux.vnet.ibm.com>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        linux-scsi <linux-scsi@...r.kernel.org>,
        linux-next <linux-next@...r.kernel.org>, jack@...e.cz,
        axboe@...nel.dk, linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        dm-devel@...hat.com, sachinp <sachinp@...ux.vnet.ibm.com>,
        Brian King <brking@...ux.vnet.ibm.com>, dougmill@...ibm.com
Subject: Re: [next-20210827][ppc][multipathd] INFO: task hung in
 dm_table_add_target


On 9/1/21 7:06 PM, Christoph Hellwig wrote:
> On Wed, Sep 01, 2021 at 04:47:26PM +0530, Abdul Haleem wrote:
>> Greeting's
>>
>> multiple task hung while adding the vfc disk back to the multipath on my
>> powerpc box running linux-next kernel
> Can you retry to reproduce this with lockdep enabled to see if there
> is anything interesting holding this lock?

LOCKDEP was earlier enabled by default

# cat .config | grep LOCKDEP
CONFIG_LOCKDEP_SUPPORT=y

BTW, Recreated again on 5.15.0-rc2 mainline kernel and attaching the logs

-- 
Regard's

Abdul Haleem
IBM Linux Technology Center


View attachment "hungtasklogs.txt" of type "text/plain" (26095 bytes)