On 2016/04/01 at 19:29, Peter Zijlstra wrote: > On Fri, Apr 01, 2016 at 07:13:18PM +0800, Xunlei Pang wrote: >> Unlike rt tasks, we (should) have no deadline tasks in >> booting phase before the mask is allocated, so we can >> safely remove the check. > Why? And have the kernel explode once it grows an early deadline task? > > Is there _any_ benefit to this?
This is a performance-critical path, it'd be better to avoid such a check. I think in the early boot stage before sched_init_smp(), it's weird to use a deadline task, relying on rt tasks should be enough for us. Please ignore it if you don't think so :-) Regards, Xunlei
