On Tue, Mar 5, 2013 at 11:00 PM, Li Zefan <lizefan@xxxxxxxxxx> wrote: >> Why should wqh->lock be hard-irq-safe? Is it actually grabbed from >> irq context? > > becase cgroup_event_wake() is a callback to a wait queue, and it's wake_up() > that acquires wqh->lock with irq disabled. So, acquiring a lock with irq disabled doesn't make it a irq lock. Being grabbed *from* irq handler makes it a irq lock. Would the wake_up() happen from irq handler? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
