On Mon, 2012-08-20 at 17:32 +0200, Oleg Nesterov wrote: > > I guess we could steal the entire list and requeue it afterwards and > > lift TIF_NOTIFY_RESUME along with it.. > > We can't. This can race with exit_task_work(). And this can break > fput(), the task can return to the userspace without __fput().
So we could put that spinlock back around cancel and run and leave add lockless. That'd solve my immediate problem but its not something I'm proud of. All schemes I can come up with end up being broken or effectively the same as the above proposal. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
