On Wed, Jan 22, 2014 at 04:27:45PM +0800, Michael wang wrote:> # CONFIG_PREEMPT_NONE is not set> CONFIG_PREEMPT_VOLUNTARY=y> # CONFIG_PREEMPT is not setCould you try the patch here: lkml.kernel.org/r/20140122102435.GH31570@twins.programming.kicks-ass.netI suspect its the same issue.