Warning: Permanently added '10.128.10.8' (ED25519) to the list of known hosts.
[+] Starting reproducer for BUG: workqueue lockup in mddev_delayed_delete...
[+] Successfully wrote '1' to /sys/module/md_mod/parameters/legacy_async_del_gendisk.
[+] Successfully wrote '1' to /sys/module/md_mod/parameters/create_on_open.
[+] Successfully wrote '3' to /sys/module/workqueue/parameters/watchdog_thresh.
[+] Successfully set sched_rt_runtime_us to -1 (disabled RT throttling).
[+] Device node /dev/md0 ready.
[+] Device node /dev/md1 ready.
[+] Device node /dev/md2 ready.
[+] Device node /dev/md3 ready.
[+] Device node /dev/md4 ready.
[+] Device node /dev/md5 ready.
[+] Device node /dev/md6 ready.
[+] Device node /dev/md7 ready.
[+] Device node /dev/md8 ready.
[+] Device node /dev/md9 ready.
[+] Device node /dev/md10 ready.
[+] Device node /dev/md11 ready.
[+] Device node /dev/md12 ready.
[+] Device node /dev/md13 ready.
[+] Device node /dev/md14 ready.
[+] Device node /dev/md15 ready.
[+] Successfully pinned thread to CPU 0.
[+] Opened /dev/md0 (fd=3).
[+] ioctl STOP_ARRAY on /dev/md0 succeeded.
[+] Opened /dev/md1 (fd=4).
[+] ioctl STOP_ARRAY on /dev/md1 succeeded.
[+] Opened /dev/md2 (fd=5).
[+] ioctl STOP_ARRAY on /dev/md2 succeeded.
[+] Opened /dev/md3 (fd=6).
[+] ioctl STOP_ARRAY on /dev/md3 succeeded.
[+] Opened /dev/md4 (fd=7).
[+] ioctl STOP_ARRAY on /dev/md4 succeeded.
[+] Opened /dev/md5 (fd=8).
[+] ioctl STOP_ARRAY on /dev/md5 succeeded.
[+] Opened /dev/md6 (fd=9).
[+] ioctl STOP_ARRAY on /dev/md6 succeeded.
[+] Opened /dev/md7 (fd=10).
[+] ioctl STOP_ARRAY on /dev/md7 succeeded.
[+] Opened /dev/md8 (fd=11).
[+] ioctl STOP_ARRAY on /dev/md8 succeeded.
[+] Opened /dev/md9 (fd=12).
[+] ioctl STOP_ARRAY on /dev/md9 succeeded.
[+] Opened /dev/md10 (fd=13).
[+] ioctl STOP_ARRAY on /dev/md10 succeeded.
[+] Opened /dev/md11 (fd=14).
[+] ioctl STOP_ARRAY on /dev/md11 succeeded.
[+] Opened /dev/md12 (fd=15).
[+] ioctl STOP_ARRAY on /dev/md12 succeeded.
[+] Opened /dev/md13 (fd=16).
[+] ioctl STOP_ARRAY on /dev/md13 succeeded.
[+] Opened /dev/md14 (fd=17).
[+] ioctl STOP_ARRAY on /dev/md14 succeeded.
[+] Opened /dev/md15 (fd=18).
[+] ioctl STOP_ARRAY on /dev/md15 succeeded.
[+] Created listener thread.
[+] Successfully pinned thread to CPU 0.
[+] Created NETLINK_KOBJECT_UEVENT socket.
[+] Bound NETLINK_KOBJECT_UEVENT socket to group 1.
[+] Elevated listener thread to SCHED_FIFO priority 99.
[+] Elevated main thread to SCHED_FIFO 50.
[+] Closing 16 devices to queue deletion works into pool 2...
[+] All 16 devices closed.
[+] Main thread sleeping for 40 seconds to allow watchdog trigger...
[+] Listener woken by uevent: remove@/devices/virtual/bdi/9:0
[+] Monopolizing CPU 0 for 35 seconds to trigger workqueue stall...