On Wed, Oct 31, 2012 at 08:25:21AM +0100, Peter Zijlstra wrote: > On Tue, 2012-10-30 at 20:45 -0700, Paul E. McKenney wrote: > > This commit therefore adds the ability > > for selected CPUs ("rcu_nocbs=" boot parameter) to have their > > callbacks > > offloaded to kthreads, inspired by Joe Korty's and Jim Houston's JRCU. > > If the "rcu_nocb_poll" boot parameter is also specified, these > > kthreads > > will do polling, removing the need for the offloaded CPUs to do > > wakeups. > > How much pain to make that dynamically configurable?
A fair amount of pain, though I do hope to make it runtime configurable at some point. Known problems include races between changes in the nocb configuration, rcu_barrier(), grace-period initialization, and CPU hotplug. Should be solvable, but want to get the other bugs out of the way first. Thanx, Paul -- 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/