On Tue, 18 Mar 2014 12:05:31 +0100 Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > * Paul E. McKenney | 2014-03-08 12:04:00 [-0800]: > > >On Sat, Mar 08, 2014 at 08:08:35PM +0100, Helmut Buchsbaum wrote: > >> This is the correct point to tweak the system, I was not yet aware of! > >> Thanks a lot for the hint. I just enabled RCU_BOOST with its default > >> settings and the system runs smooth and stable again even in heavy > >> load situations. Maybe the default for RCU_BOOST should be set to Y on > >> systems using PREEMPT_RT_FULL ? > > > >I must defer to Sebastian on this, but seems like a good approach. > > Hmm. There are a few ways to break an RT system. Afaik RCU_BOOST was > recommended even before this change. > > Steven, tglx any opinion on that? > > Another thing we could do is to register_shrinker() which is called > before OOM. But then boosting is simple enough. I thought RCU_BOOST was already set for default y when PREEMPT_RT is set. If not, then please add it. Note, the default should be set, but not selected. Still let the user disable it. default y if PREEMPT_RT_FULL Thanks, -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
