From: Jens Axboe <axboe@kernel.dk>
To: Ming Lei <ming.lei@redhat.com>,
linux-block@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@infradead.org>,
"jianchao . wang" <jianchao.w.wang@oracle.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Stefan Haberland <sth@linux.vnet.ibm.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 2/2] blk-mq: convert WARN_ON in __blk_mq_run_hw_queue to printk
Date: Wed, 17 Jan 2018 08:46:40 -0700 [thread overview]
Message-ID: <39203c80-e718-3aa6-6b21-05a6bf0ad9b0@kernel.dk> (raw)
In-Reply-To: <20180117123444.18393-3-ming.lei@redhat.com>
On 1/17/18 5:34 AM, Ming Lei wrote:
> We know this WARN_ON is harmless and the stack trace isn't useful too,
> so convert it to printk(), and avoid to confuse people.
I disagree, it is useful to know the exact path it happened from,
in case it's a valid warning. It could be an inline run and
we screwed up the logic, or it could be from a workqueue and
the reason would be entirely different.
--
Jens Axboe
next prev parent reply other threads:[~2018-01-17 15:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-17 12:34 [PATCH 0/2] blk-mq: two patches related with CPU hotplug Ming Lei
2018-01-17 12:34 ` [PATCH 1/2] blk-mq: make sure hctx->next_cpu is set correctly Ming Lei
2018-01-17 15:45 ` Jens Axboe
2018-01-17 16:14 ` Ming Lei
2018-01-17 12:34 ` [PATCH 2/2] blk-mq: convert WARN_ON in __blk_mq_run_hw_queue to printk Ming Lei
2018-01-17 15:46 ` Jens Axboe [this message]
2018-01-17 16:05 ` Christian Borntraeger
2018-01-17 16:07 ` Jens Axboe
2018-01-17 16:17 ` Ming Lei
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