Dmitry Adamushko wrote: > On 06/06/07, Srivatsa Vaddagiri <[EMAIL PROTECTED]> wrote: >> On Wed, Jun 06, 2007 at 09:01:43AM +0200, Ingo Molnar wrote: >> > [...] and my tree already contains the fixes for rt task's >> > exec_start. >> >> Can I have this snapshot pls? I have to deal with the same issue when >> the current task switches groups and I was planning to fix it by >> introducing a set_curr_task() method in fair_sched_class which >> initializes exec_start and other fields for that task. > > Hum.. what about accounting 'exec_time' and updating 'exec_start' in > rt_sched :: dequeue_task_rt() instead (like update_curr() does it in > dequeue_task_fair())? > > This way, on RT -> NORMAL transition.. some 'delta_exec' ( between > deactivate_task() ---> activate_task() ) will be accounted later as if > the task was 'sched_fair_class' during this time.. which I think makes > some sense. What do you think? >
Why not do it explicitly in __setscheduler() if the new policy is SCHED_NORMAL or SCHED_BATCH. You could also add the smarts to deactivate_task() > sched_setscheduler() > { > ... > on_rq = p->on_rq; > if (on_rq) > deactivate_task(rq, p, 0); > oldprio = p->prio; > __setscheduler(rq, p, policy, param->sched_priority); > if (on_rq) { > activate_task(rq, p, 0); > ... > > >> -- >> Regards, >> vatsa >> > -- Warm Regards, Balbir Singh Linux Technology Center IBM, ISTL - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/