On Mon, 2018-05-21 at 16:50 +1000, Nicholas Piggin wrote: > Ah, it's POWER8. > > I'm betting we have a bug with nohz timer offloading somewhere. > > I *think* we may have seen similar on P9 as well, but that may be > related to problems with stop states. > > Can you reproduce it easily? I'm thinking maybe adding some > tracepoints that track decrementer settings and interrupts, and > nohz offload activity might show something up. Yes, the problem is reproducible consistently on our CI setup and today It triggered on 4.17.0-rc6 (mainline) too. -- Regard's Abdul Haleem IBM Linux Technology Centre -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
