Re: [PATCH 2/2] nvme-fc: Wait with a timeout for queue to freeze

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:

quoted

quoted

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

quoted

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


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