diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-12-20 14:13:49 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-04-10 00:18:34 (GMT) |
| commit | 7287941301f62f31b2731d306c9f2d1d3745f8e8 (patch) | |
| tree | cf899785ce9647ae27d2601010e290764ef6a32c /include | |
| parent | efb2fb86cd10f4248e1570fa70bb0c4d40b4bc09 (diff) | |
| download | linux-fsl-qoriq-7287941301f62f31b2731d306c9f2d1d3745f8e8.tar.xz | |
sched: Consider pi boosting in setscheduler
If a PI boosted task policy/priority is modified by a setscheduler()
call we unconditionally dequeue and requeue the task if it is on the
runqueue even if the new priority is lower than the current effective
boosted priority. This can result in undesired reordering of the
priority bucket list.
If the new priority is less or equal than the current effective we
just store the new parameters in the task struct and leave the
scheduler class and the runqueue untouched. This is handled when the
task deboosts itself. Only if the new priority is higher than the
effective boosted priority we apply the change immediately.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Cc: stable-rt@vger.kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched/rt.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/sched/rt.h b/include/linux/sched/rt.h index 440434d..4d54d6c 100644 --- a/include/linux/sched/rt.h +++ b/include/linux/sched/rt.h @@ -35,6 +35,7 @@ static inline int rt_task(struct task_struct *p) #ifdef CONFIG_RT_MUTEXES extern int rt_mutex_getprio(struct task_struct *p); extern void rt_mutex_setprio(struct task_struct *p, int prio); +extern int rt_mutex_check_prio(struct task_struct *task, int newprio); extern void rt_mutex_adjust_pi(struct task_struct *p); static inline bool tsk_is_pi_blocked(struct task_struct *tsk) { @@ -45,6 +46,10 @@ static inline int rt_mutex_getprio(struct task_struct *p) { return p->normal_prio; } +static inline int rt_mutex_check_prio(struct task_struct *task, int newprio) +{ + return 0; +} # define rt_mutex_adjust_pi(p) do { } while (0) static inline bool tsk_is_pi_blocked(struct task_struct *tsk) { |