On Wed, Nov 19, 2014 at 12:15:24AM -0500, Dave Jones wrote: > On Tue, Nov 18, 2014 at 08:40:55PM -0800, Linus Torvalds wrote: > > > Hmm, if we are getting soft-lockups here, maybe it suggest too much > exit-work. > > > > Some TIF_NOHZ loop, perhaps? You have nohz on, don't you? > > > > That makes me wonder: does the problem go away if you disable NOHZ? > > Does nohz=off do enough ? I couldn't convince myself after looking at > dmesg, and still seeing dynticks stuff in there. > > I'll do a rebuild with all the CONFIG_NO_HZ stuff off, though it also changes > some other config stuff wrt timers.
You also need to disable context tracking. So you need to deactive also CONFIG_RCU_USER_QS and CONFIG_CONTEXT_TRACKING_FORCE and eventually make sure nothing else is turning on CONFIG_CONTEXT_TRACKING. You can keep CONFIG_NO_HZ_IDLE though, just not CONFIG_NO_HZ_FULL. -- 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/
