Hi Steven,

Two of my test boxes run the slower QEMU VMs and the guest kernels
often trigger warnings like:

[  511.809001] Testing event mm_vmscan_memcg_reclaim_end: [  512.852980] INFO: task rb_producer:17 blocked for more than 120 seconds.
[  513.279212] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

Will it be possible to insert some break into the test thread for
avoiding the warnings?

Thanks,
Fengguang