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