So it may be that the write-back-throttling (wbt) for the underlying devices is getting confused about the exact throttle rates are for these devices and somehow getting stuck. It maybe worth experimenting by disabling the throttling and seeing if this gets I/O working again.
For example, to disable wbt for a device /dev/sda use: echo 0 | sudo tee /sys/block/sda/queue/wbt_lat_usec and if you need to reset it back to the default: echo -1 | sudo tee /sys/block/sda/queue/wbt_lat_usec ..use the appropriate block device name for the block devices you have attached. It may even be worth setting the wbt_lat_usec to 0 for all the block devices in your pool as early as possible after boot and see if this helps. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1889110 Title: zfs pool locks and see "INFO: task txg_sync:4307 blocked for more than 120 seconds. " To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1889110/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
