On 01/07/19 21:11, Peter Zijlstra wrote: > On Fri, Jun 28, 2019 at 10:06:17AM +0200, Juri Lelli wrote: > > No synchronisation mechanism exists between the cpuset subsystem and > > calls to function __sched_setscheduler(). As such, it is possible that > > new root domains are created on the cpuset side while a deadline > > acceptance test is carried out in __sched_setscheduler(), leading to a > > potential oversell of CPU bandwidth. > > > > Grab cpuset_rwsem read lock from core scheduler, so to prevent > > situations such as the one described above from happening. > > > > ISTR there being a funny vs normalize_rt_tasks(); maybe mention that? Yep. I'll add a comment about it.
