2014-07-31 20:47 GMT+02:00 Frederic Weisbecker <fweisbec@xxxxxxxxx>: > On Thu, Jul 31, 2014 at 08:12:30PM +0200, Oleg Nesterov wrote: >> On 07/31, Frederic Weisbecker wrote: > No, because preempt_schedule_irq() does the ctx_state save and restore with > exception_enter/exception_exit. Similar thing happens with schedule_user(). preempt_schedule_irq() handles kernel preemption and schedule_user() the user preemption. On both cases we save and restore the context tracking state. This might be the missing piece you were missing :)
