Write I/O queue hangup at random on recent Linus' kernels

[Kenneth R. Crudup]

On Tue, 23 Nov 2021, Jens Axboe wrote:

> It looks like some missed accounting. You can just disable wbt for now, would
> be a useful data point to see if that fixes it. Just do:

> echo 0 > /sys/block/nvme0n1/queue/wbt_lat_usec

> and that will disable writeback throttling on that device.

It's been about 48 hours and haven't seen the issue since doing this.

	-Kenny

-- 
Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA