Group, Ingo Molnar, and Dmitry, et al,
task mm/page-writeback.c : get_dirty_limits()
Shouldn't the PF_LESS_THROTTLE flag be
scheduling class independent?
The below is a suggestion is to use the flag for
RT tasks.
-- to drop the rt_task() call within the function
if (tsk->flags & PF_LESS_THROTTLE || rt_task(tsk)) {
1) becomes
if (tsk->flags & PF_LESS_THROTTLE)
Then
2) in kernel/sched.c set:
p->flags |= PF_LESS_THROTTLE before the break;
case SCHED_FIFO:
case SCHED_RR:
p->sched_class = &rt_sched_class;
p->flags |= PF_LESS_THROTTLE;
break;
3) Unset it in case sched class changed; before the break
case SCHED_NORMAL:
case SCHED_BATCH:
case SCHED_IDLE:
p->sched_class = &fair_sched_class;
p->flags &= ~PF_LESS_THROTTLE;
break;
4) set the flag rt_mutex_setprio with braces
if (rt_prio(prio)) {
p->sched_class = &rt_sched_class;
p->flags |= PF_LESS_THROTTLE;
} else
5) Am I missing anything?
Mitchell Erblich
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