On Tue, Jul 12, 2011 at 11:31:00AM +0200, Peter Zijlstra wrote: > On Tue, 2011-07-12 at 12:27 +0300, Avi Kivity wrote: > > But it means that 'current' is not set to the right value. If the > > function depends on it, then it will misbehave. And in fact > > preempt_notifier_register(), which is the function we want to call here, > > does depend on current. > > > > Of course we need to find more users for this, but I have a feeling this > > will be generally useful. The alternative is to keep adding bits to > > thread_info::flags. > > Using TIF_bits sounds like a much better solution for this, wakeups are > really rather expensive and its best to avoid extra if at all possible. I would rather vote for Avi's solution too. Such a functionality is very helpful for LWP-perf integration as well (because we need a way to call do_mmap for a task != current). Regards, Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
