fyi, I have found the source!!! test_kraken-695 [001] d.h.. 21957.157432: timer_start: timer=0000000076c6a349 function=mix_interrupt_randomness expires=4297132992 [timeout=0] bucket_expiry=4297132993 cpu=1 idx=1 flags=P test_kraken-695 [001] d.h.. 21964.197366: timer_start: timer=000000006ea403de function=do_nocb_deferred_wakeup_timer expires=4297133697 [timeout=1] bucket_expiry=4297133698 cpu=1 idx=2 flags= test_kraken-695 [001] d.h.. 21964.197368: timer_start: timer=0000000076c6a349 function=mix_interrupt_randomness expires=4297133696 [timeout=0] bucket_expiry=4297133697 cpu=1 idx=1 flags=P enqueue_timer() is calling trigger_dyntick_cpu()... the vast majority of these timers are from mix_interrupt_randomness but there is also the occasional do_nocb_deferred_wakeup_timer... every time I see a trace, at the same time, I see the interrupt count increment... there is possible doubt... Now, it is time to find a solution or a workaround but I was so happy of my discovery that I wanted to share!