On 12/08/2014 10:57 AM, Paul E. McKenney wrote: > On Mon, Dec 08, 2014 at 10:28:53AM -0500, Sasha Levin wrote: >> > On 12/08/2014 09:33 AM, Sasha Levin wrote: >>> > > On 12/08/2014 12:20 AM, Paul E. McKenney wrote: >>>>> > >> > I have seen this caused by lost IPIs, but you have to lose two of >>>>> > >> > them, >>>>> > >> > which seems less than fully likely. >>> > > It does seem that it can cause full blown stalls as well, just pretty >>> > > rarely (notice the lack of any prints before): >> > >> > Forgot to mentioned, I cranked the rcu lockup timeout to 300 seconds and >> > got >> > that stall. > So with the default of 21 seconds, you presumably get huge numbers of > RCU CPU stall warnings?
Yes, I'm seeing 1 lockup every ~5 minutes on my set up. The traces do seem to be different every time. Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
