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From: krisman@linux.vnet.ibm.com (Gabriel Krisman Bertazi)
Subject: WARN_ON hit on __blk_mq_run_hw_queue followed by an Oops
Date: Tue, 05 Jul 2016 15:10:06 -0300	[thread overview]
Message-ID: <87r3b85535.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <577B6F0C.4010506@jp.fujitsu.com> (Masayoshi Mizuma's message of "Tue, 5 Jul 2016 17:25:48 +0900")

Masayoshi Mizuma <m.mizuma at jp.fujitsu.com> writes:

> Is this WARN_ON still appear in 4.7-rc6 ?
> If so, the following patch may fix this problem.
>
> http://lists.infradead.org/pipermail/linux-nvme/2016-July/005303.html

Hi,

I experimented with this patch before and I still could see the issue.

The warning is not the only symptom anymore, as we also may reach a
deadlock while waiting for queues to freeze in the
blk_mq_queue_reinit_notify path. This may or may not be related.

Things are a little confusing yet, but I'm debugging it and made a good
progress on avoiding the warning.  I'll submit a patch soon.

Thanks,

-- 
Gabriel Krisman Bertazi

  reply	other threads:[~2016-07-05 18:10 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-15 15:09 WARN_ON hit on __blk_mq_run_hw_queue followed by an Oops Gabriel Krisman Bertazi
2016-07-05  8:25 ` Masayoshi Mizuma
2016-07-05 18:10   ` Gabriel Krisman Bertazi [this message]
2016-07-07 23:51     ` Masayoshi Mizuma

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