On Tue, Jul 12, 2011 at 10:36:05AM +0100, Avi Kivity wrote: > On 07/12/2011 12:31 PM, Peter Zijlstra 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. > > > > We do need a way to make the task look at them.
... especially without pushing this down into the arch code where I don't think it belongs. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
