On Wed, Jun 26, 2013 at 03:29:40PM +0100, David Laight wrote: > > Once stop_machine() is gone from the CPU offline path, we won't be able > > to depend on disabling preemption to prevent CPUs from going offline > > from under us. > > Could you use an rcu-like sequence so that disabling pre-emption > would be enough? > > Something like rebuilding the cpu list, then forcing yourself > to run on all the cpu. > > That would be far less intrusive. It would also increase the latency of CPU-hotunplug operations. Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
