> > > + /* Update resource control msr on all the CPUs. */ > > > + on_each_cpu_mask(cpu_mask, rdt_ctrl_update, &msr_param, 1); > > > > Do you require these updates to done immediately via an IPI? or can they be > > done bit lazy via schedule_on_each_cpu()? > > I have not experimented with lazy schedule. At least I know the call > update_cpu_closid_rmid should be completed immediately. Otherwise, the > result might be inconsistent as the tasks(or CPUs) could be running on > two different closed/rmids before it is updated on all CPUs in the domain. I think this does need to happen somewhat urgently. Imagine trying to give some extra resources to a CPU bound real-time process. That process will keep running with the old resource allocation. -Tony
