diff options
| author | Juri Lelli <juri.lelli@arm.com> | 2015-06-26 12:14:23 +0100 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2016-09-14 14:58:22 +0530 |
| commit | a0933a372d84e341911f2a09cdb9980584315f03 (patch) | |
| tree | 080c9496cb6f5458d71a044d7a4b3bdb2859afe1 /kernel/sched/core.c | |
| parent | d2bf66aac444a8d0ea95e5ff17a0e8563766c594 (diff) | |
sched/{core,fair}: trigger OPP change request on fork()
Patch "sched/fair: add triggers for OPP change requests" introduced OPP
change triggers for enqueue_task_fair(), but the trigger was operating only
for wakeups. Fact is that it makes sense to consider wakeup_new also (i.e.,
fork()), as we don't know anything about a newly created task and thus we
most certainly want to jump to max OPP to not harm performance too much.
However, it is not currently possible (or at least it wasn't evident to me
how to do so :/) to tell new wakeups from other (non wakeup) operations.
This patch introduces an additional flag in sched.h that is only set at
fork() time and it is then consumed in enqueue_task_fair() for our purpose.
cc: Ingo Molnar <mingo@redhat.com>
cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Steve Muckle <smuckle@linaro.org>
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 69a36dd165e2..569a2f0f01e4 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2387,7 +2387,7 @@ void wake_up_new_task(struct task_struct *p) #endif rq = __task_rq_lock(p); - activate_task(rq, p, 0); + activate_task(rq, p, ENQUEUE_WAKEUP_NEW); p->on_rq = TASK_ON_RQ_QUEUED; trace_sched_wakeup_new(p); check_preempt_curr(rq, p, WF_FORK); |