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From: Ming Lei <ming.lei@redhat.com>
To: Daniel Wagner <dwagner@suse.de>
Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
	James Smart <james.smart@broadcom.com>,
	Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@fb.com>,
	Sagi Grimberg <sagi@grimberg.me>
Subject: Re: [PATCH 2/2] nvme-fc: Wait with a timeout for queue to freeze
Date: Tue, 6 Jul 2021 16:45:30 +0800	[thread overview]
Message-ID: <YOQYKn+POVR2g/h1@T590> (raw)
In-Reply-To: <20210706081010.dqmg7bxik5gnym5k@beryllium.lan>

On Tue, Jul 06, 2021 at 10:10:10AM +0200, Daniel Wagner wrote:
> On Tue, Jul 06, 2021 at 03:29:11PM +0800, Ming Lei wrote:
> > > and this seems to confirm, no I/O in flight.
> > 
> > What is the output of the following command after the hang is triggered?
> > 
> > (cd /sys/kernel/debug/block/nvme0n1 && find . -type f -exec grep -aH . {} \;)
> > 
> > Suppose the hang disk is nvme0n1.
> 
> see attachement
> 
> > No, percpu_ref_is_zero() is fine to be called in atomic mode.
> 
> Okay, that is what I hoped for :)

> /sys/kernel/debug/block/nvme0c0n1# find . -type f -exec grep -aH . {} \;

It is the mpath device's debugfs, what is output for the nvmef's
debugfs?


Thanks,
Ming


  reply	other threads:[~2021-07-06  8:45 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-25 10:16 [PATCH 0/2] Handle update hardware queues and queue freeze more carefully Daniel Wagner
2021-06-25 10:16 ` [PATCH 1/2] nvme-fc: Update hardware queues before using them Daniel Wagner
2021-06-27 13:47   ` James Smart
2021-06-29  1:32   ` Ming Lei
2021-06-29 12:31   ` Hannes Reinecke
2021-06-25 10:16 ` [PATCH 2/2] nvme-fc: Wait with a timeout for queue to freeze Daniel Wagner
2021-06-27 14:04   ` James Smart
2021-06-29  1:39   ` Ming Lei
2021-06-29  7:48     ` Daniel Wagner
2021-07-05 16:34     ` Daniel Wagner
2021-07-06  7:29       ` Ming Lei
2021-07-06  8:10         ` Daniel Wagner
2021-07-06  8:45           ` Ming Lei [this message]
2021-07-06  8:59             ` Daniel Wagner
2021-07-06 12:21               ` Daniel Wagner
2021-07-07  2:46                 ` Ming Lei
2021-06-29 12:31   ` Hannes Reinecke
2021-06-25 12:21 ` [PATCH 0/2] Handle update hardware queues and queue freeze more carefully Daniel Wagner
2021-06-25 13:00   ` Ming Lei
2021-06-29  1:31     ` Ming Lei

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