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sched: style cleanups
style cleanup of various changes that were done recently.
no code changed:
text data bss dec hex filename
23680 2542 28 26250 668a sched.o.before
23680 2542 28 26250 668a sched.o.after
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
parent
ce6bd420f4
commit
41a2d6cfa3
1 changed files with 68 additions and 64 deletions
132
kernel/sched.c
132
kernel/sched.c
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@ -209,9 +209,8 @@ static inline struct task_group *task_group(struct task_struct *p)
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tg = container_of(task_subsys_state(p, cpu_cgroup_subsys_id),
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struct task_group, css);
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#else
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tg = &init_task_group;
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tg = &init_task_group;
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#endif
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return tg;
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}
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@ -249,15 +248,16 @@ struct cfs_rq {
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#ifdef CONFIG_FAIR_GROUP_SCHED
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struct rq *rq; /* cpu runqueue to which this cfs_rq is attached */
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/* leaf cfs_rqs are those that hold tasks (lowest schedulable entity in
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/*
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* leaf cfs_rqs are those that hold tasks (lowest schedulable entity in
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* a hierarchy). Non-leaf lrqs hold other higher schedulable entities
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* (like users, containers etc.)
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*
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* leaf_cfs_rq_list ties together list of leaf cfs_rq's in a cpu. This
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* list is used during load balance.
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*/
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struct list_head leaf_cfs_rq_list; /* Better name : task_cfs_rq_list? */
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struct task_group *tg; /* group that "owns" this runqueue */
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struct list_head leaf_cfs_rq_list;
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struct task_group *tg; /* group that "owns" this runqueue */
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#endif
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};
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@ -300,7 +300,7 @@ struct rq {
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/* list of leaf cfs_rq on this cpu: */
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struct list_head leaf_cfs_rq_list;
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#endif
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struct rt_rq rt;
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struct rt_rq rt;
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/*
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* This is part of a global counter where only the total sum
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@ -457,8 +457,8 @@ enum {
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SCHED_FEAT_NEW_FAIR_SLEEPERS = 1,
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SCHED_FEAT_WAKEUP_PREEMPT = 2,
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SCHED_FEAT_START_DEBIT = 4,
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SCHED_FEAT_TREE_AVG = 8,
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SCHED_FEAT_APPROX_AVG = 16,
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SCHED_FEAT_TREE_AVG = 8,
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SCHED_FEAT_APPROX_AVG = 16,
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};
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const_debug unsigned int sysctl_sched_features =
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@ -591,7 +591,7 @@ static inline struct rq *__task_rq_lock(struct task_struct *p)
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/*
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* task_rq_lock - lock the runqueue a given task resides on and disable
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* interrupts. Note the ordering: we can safely lookup the task_rq without
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* interrupts. Note the ordering: we can safely lookup the task_rq without
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* explicitly disabling preemption.
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*/
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static struct rq *task_rq_lock(struct task_struct *p, unsigned long *flags)
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@ -779,7 +779,7 @@ static inline void update_load_sub(struct load_weight *lw, unsigned long dec)
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* To aid in avoiding the subversion of "niceness" due to uneven distribution
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* of tasks with abnormal "nice" values across CPUs the contribution that
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* each task makes to its run queue's load is weighted according to its
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* scheduling class and "nice" value. For SCHED_NORMAL tasks this is just a
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* scheduling class and "nice" value. For SCHED_NORMAL tasks this is just a
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* scaled version of the new time slice allocation that they receive on time
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* slice expiry etc.
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*/
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@ -1854,7 +1854,7 @@ prepare_task_switch(struct rq *rq, struct task_struct *prev,
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* and do any other architecture-specific cleanup actions.
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*
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* Note that we may have delayed dropping an mm in context_switch(). If
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* so, we finish that here outside of the runqueue lock. (Doing it
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* so, we finish that here outside of the runqueue lock. (Doing it
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* with the lock held can cause deadlocks; see schedule() for
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* details.)
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*/
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@ -2136,7 +2136,7 @@ static void double_lock_balance(struct rq *this_rq, struct rq *busiest)
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/*
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* If dest_cpu is allowed for this process, migrate the task to it.
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* This is accomplished by forcing the cpu_allowed mask to only
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* allow dest_cpu, which will force the cpu onto dest_cpu. Then
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* allow dest_cpu, which will force the cpu onto dest_cpu. Then
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* the cpu_allowed mask is restored.
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*/
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static void sched_migrate_task(struct task_struct *p, int dest_cpu)
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@ -2581,7 +2581,7 @@ group_next:
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* tasks around. Thus we look for the minimum possible imbalance.
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* Negative imbalances (*we* are more loaded than anyone else) will
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* be counted as no imbalance for these purposes -- we can't fix that
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* by pulling tasks to us. Be careful of negative numbers as they'll
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* by pulling tasks to us. Be careful of negative numbers as they'll
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* appear as very large values with unsigned longs.
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*/
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if (max_load <= busiest_load_per_task)
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@ -3016,7 +3016,7 @@ static void active_load_balance(struct rq *busiest_rq, int busiest_cpu)
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/*
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* This condition is "impossible", if it occurs
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* we need to fix it. Originally reported by
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* we need to fix it. Originally reported by
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* Bjorn Helgaas on a 128-cpu setup.
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*/
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BUG_ON(busiest_rq == target_rq);
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@ -3048,7 +3048,7 @@ static void active_load_balance(struct rq *busiest_rq, int busiest_cpu)
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#ifdef CONFIG_NO_HZ
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static struct {
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atomic_t load_balancer;
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cpumask_t cpu_mask;
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cpumask_t cpu_mask;
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} nohz ____cacheline_aligned = {
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.load_balancer = ATOMIC_INIT(-1),
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.cpu_mask = CPU_MASK_NONE,
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@ -3552,7 +3552,7 @@ static noinline void __schedule_bug(struct task_struct *prev)
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static inline void schedule_debug(struct task_struct *prev)
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{
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/*
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* Test if we are atomic. Since do_exit() needs to call into
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* Test if we are atomic. Since do_exit() needs to call into
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* schedule() atomically, we ignore that path for now.
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* Otherwise, whine if we are scheduling when we should not be.
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*/
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@ -3674,7 +3674,7 @@ EXPORT_SYMBOL(schedule);
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#ifdef CONFIG_PREEMPT
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/*
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* this is the entry point to schedule() from in-kernel preemption
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* off of preempt_enable. Kernel preemptions off return from interrupt
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* off of preempt_enable. Kernel preemptions off return from interrupt
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* occur there and call schedule directly.
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*/
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asmlinkage void __sched preempt_schedule(void)
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@ -3686,7 +3686,7 @@ asmlinkage void __sched preempt_schedule(void)
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#endif
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/*
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* If there is a non-zero preempt_count or interrupts are disabled,
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* we do not want to preempt the current task. Just return..
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* we do not want to preempt the current task. Just return..
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*/
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if (likely(ti->preempt_count || irqs_disabled()))
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return;
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@ -3772,12 +3772,12 @@ int default_wake_function(wait_queue_t *curr, unsigned mode, int sync,
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EXPORT_SYMBOL(default_wake_function);
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/*
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* The core wakeup function. Non-exclusive wakeups (nr_exclusive == 0) just
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* wake everything up. If it's an exclusive wakeup (nr_exclusive == small +ve
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* The core wakeup function. Non-exclusive wakeups (nr_exclusive == 0) just
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* wake everything up. If it's an exclusive wakeup (nr_exclusive == small +ve
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* number) then we wake all the non-exclusive tasks and one exclusive task.
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*
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* There are circumstances in which we can try to wake a task which has already
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* started to run but is not in state TASK_RUNNING. try_to_wake_up() returns
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* started to run but is not in state TASK_RUNNING. try_to_wake_up() returns
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* zero in this (rare) case, and we handle it by continuing to scan the queue.
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*/
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static void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
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@ -4390,8 +4390,8 @@ do_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param)
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* @policy: new policy.
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* @param: structure containing the new RT priority.
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*/
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asmlinkage long sys_sched_setscheduler(pid_t pid, int policy,
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struct sched_param __user *param)
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asmlinkage long
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sys_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param)
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{
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/* negative values for policy are not valid */
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if (policy < 0)
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@ -4491,7 +4491,7 @@ long sched_setaffinity(pid_t pid, cpumask_t new_mask)
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/*
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* It is not safe to call set_cpus_allowed with the
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* tasklist_lock held. We will bump the task_struct's
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* tasklist_lock held. We will bump the task_struct's
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* usage count and then drop tasklist_lock.
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*/
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get_task_struct(p);
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@ -4687,7 +4687,7 @@ EXPORT_SYMBOL(cond_resched);
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* cond_resched_lock() - if a reschedule is pending, drop the given lock,
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* call schedule, and on return reacquire the lock.
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*
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* This works OK both with and without CONFIG_PREEMPT. We do strange low-level
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* This works OK both with and without CONFIG_PREEMPT. We do strange low-level
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* operations here to prevent schedule() from being called twice (once via
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* spin_unlock(), once by hand).
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*/
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@ -4741,7 +4741,7 @@ void __sched yield(void)
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EXPORT_SYMBOL(yield);
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/*
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* This task is about to go to sleep on IO. Increment rq->nr_iowait so
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* This task is about to go to sleep on IO. Increment rq->nr_iowait so
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* that process accounting knows that this is a task in IO wait state.
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*
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* But don't do that if it is a deliberate, throttling IO wait (this task
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@ -5050,7 +5050,7 @@ static inline void sched_init_granularity(void)
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* is removed from the allowed bitmask.
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*
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* NOTE: the caller must have a valid reference to the task, the
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* task must not exit() & deallocate itself prematurely. The
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* task must not exit() & deallocate itself prematurely. The
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* call is not atomic; no spinlocks may be held.
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*/
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int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
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@ -5087,7 +5087,7 @@ out:
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EXPORT_SYMBOL_GPL(set_cpus_allowed);
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/*
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* Move (not current) task off this cpu, onto dest cpu. We're doing
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* Move (not current) task off this cpu, onto dest cpu. We're doing
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* this because either it can't run here any more (set_cpus_allowed()
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* away from this CPU, or CPU going down), or because we're
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* attempting to rebalance this task on exec (sched_exec).
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@ -5232,7 +5232,7 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
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* Try to stay on the same cpuset, where the
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* current cpuset may be a subset of all cpus.
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* The cpuset_cpus_allowed_locked() variant of
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* cpuset_cpus_allowed() will not block. It must be
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* cpuset_cpus_allowed() will not block. It must be
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* called within calls to cpuset_lock/cpuset_unlock.
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*/
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rq = task_rq_lock(p, &flags);
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@ -5245,10 +5245,11 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
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* kernel threads (both mm NULL), since they never
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* leave kernel.
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*/
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if (p->mm && printk_ratelimit())
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if (p->mm && printk_ratelimit()) {
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printk(KERN_INFO "process %d (%s) no "
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"longer affine to cpu%d\n",
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task_pid_nr(p), p->comm, dead_cpu);
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task_pid_nr(p), p->comm, dead_cpu);
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}
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}
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} while (!__migrate_task_irq(p, dead_cpu, dest_cpu));
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}
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@ -5350,7 +5351,7 @@ static void migrate_dead(unsigned int dead_cpu, struct task_struct *p)
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/*
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* Drop lock around migration; if someone else moves it,
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* that's OK. No task can be added to this CPU, so iteration is
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* that's OK. No task can be added to this CPU, so iteration is
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* fine.
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*/
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spin_unlock_irq(&rq->lock);
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@ -5414,7 +5415,7 @@ static void sd_free_ctl_entry(struct ctl_table **tablep)
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/*
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* In the intermediate directories, both the child directory and
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* procname are dynamically allocated and could fail but the mode
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* will always be set. In the lowest directory the names are
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* will always be set. In the lowest directory the names are
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* static strings and all have proc handlers.
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*/
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for (entry = *tablep; entry->mode; entry++) {
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@ -5585,7 +5586,7 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
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case CPU_UP_CANCELED_FROZEN:
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if (!cpu_rq(cpu)->migration_thread)
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break;
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/* Unbind it from offline cpu so it can run. Fall thru. */
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/* Unbind it from offline cpu so it can run. Fall thru. */
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kthread_bind(cpu_rq(cpu)->migration_thread,
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any_online_cpu(cpu_online_map));
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kthread_stop(cpu_rq(cpu)->migration_thread);
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@ -5612,9 +5613,11 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
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migrate_nr_uninterruptible(rq);
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BUG_ON(rq->nr_running != 0);
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/* No need to migrate the tasks: it was best-effort if
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* they didn't take sched_hotcpu_mutex. Just wake up
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* the requestors. */
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/*
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* No need to migrate the tasks: it was best-effort if
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* they didn't take sched_hotcpu_mutex. Just wake up
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* the requestors.
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*/
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spin_lock_irq(&rq->lock);
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while (!list_empty(&rq->migration_queue)) {
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struct migration_req *req;
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@ -5922,7 +5925,7 @@ init_sched_build_groups(cpumask_t span, const cpumask_t *cpu_map,
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* @node: node whose sched_domain we're building
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* @used_nodes: nodes already in the sched_domain
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*
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* Find the next node to include in a given scheduling domain. Simply
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* Find the next node to include in a given scheduling domain. Simply
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* finds the closest node not already in the @used_nodes map.
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*
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* Should use nodemask_t.
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@ -5962,7 +5965,7 @@ static int find_next_best_node(int node, unsigned long *used_nodes)
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* @node: node whose cpumask we're constructing
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* @size: number of nodes to include in this span
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*
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* Given a node, construct a good cpumask for its sched_domain to span. It
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* Given a node, construct a good cpumask for its sched_domain to span. It
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* should be one that prevents unnecessary balancing, but also spreads tasks
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* out optimally.
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*/
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@ -5999,8 +6002,8 @@ int sched_smt_power_savings = 0, sched_mc_power_savings = 0;
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static DEFINE_PER_CPU(struct sched_domain, cpu_domains);
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static DEFINE_PER_CPU(struct sched_group, sched_group_cpus);
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static int cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map,
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struct sched_group **sg)
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static int
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cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
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{
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if (sg)
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*sg = &per_cpu(sched_group_cpus, cpu);
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@ -6017,8 +6020,8 @@ static DEFINE_PER_CPU(struct sched_group, sched_group_core);
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#endif
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#if defined(CONFIG_SCHED_MC) && defined(CONFIG_SCHED_SMT)
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static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
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struct sched_group **sg)
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static int
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cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
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{
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int group;
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cpumask_t mask = per_cpu(cpu_sibling_map, cpu);
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@ -6029,8 +6032,8 @@ static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
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return group;
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}
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#elif defined(CONFIG_SCHED_MC)
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static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
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struct sched_group **sg)
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static int
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cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
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{
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if (sg)
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*sg = &per_cpu(sched_group_core, cpu);
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@ -6041,8 +6044,8 @@ static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
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static DEFINE_PER_CPU(struct sched_domain, phys_domains);
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static DEFINE_PER_CPU(struct sched_group, sched_group_phys);
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static int cpu_to_phys_group(int cpu, const cpumask_t *cpu_map,
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struct sched_group **sg)
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static int
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cpu_to_phys_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
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{
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int group;
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#ifdef CONFIG_SCHED_MC
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@ -6222,7 +6225,7 @@ static int build_sched_domains(const cpumask_t *cpu_map)
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* Allocate the per-node list of sched groups
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*/
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sched_group_nodes = kcalloc(MAX_NUMNODES, sizeof(struct sched_group *),
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GFP_KERNEL);
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GFP_KERNEL);
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if (!sched_group_nodes) {
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printk(KERN_WARNING "Can not alloc sched group node list\n");
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return -ENOMEM;
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@ -6469,7 +6472,7 @@ static int ndoms_cur; /* number of sched domains in 'doms_cur' */
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static cpumask_t fallback_doms;
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/*
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* Set up scheduler domains and groups. Callers must hold the hotplug lock.
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* Set up scheduler domains and groups. Callers must hold the hotplug lock.
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* For now this just excludes isolated cpus, but could be used to
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* exclude other special cases in the future.
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*/
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@ -6511,19 +6514,19 @@ static void detach_destroy_domains(const cpumask_t *cpu_map)
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/*
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* Partition sched domains as specified by the 'ndoms_new'
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* cpumasks in the array doms_new[] of cpumasks. This compares
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* cpumasks in the array doms_new[] of cpumasks. This compares
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* doms_new[] to the current sched domain partitioning, doms_cur[].
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* It destroys each deleted domain and builds each new domain.
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*
|
||||
* 'doms_new' is an array of cpumask_t's of length 'ndoms_new'.
|
||||
* The masks don't intersect (don't overlap.) We should setup one
|
||||
* sched domain for each mask. CPUs not in any of the cpumasks will
|
||||
* not be load balanced. If the same cpumask appears both in the
|
||||
* The masks don't intersect (don't overlap.) We should setup one
|
||||
* sched domain for each mask. CPUs not in any of the cpumasks will
|
||||
* not be load balanced. If the same cpumask appears both in the
|
||||
* current 'doms_cur' domains and in the new 'doms_new', we can leave
|
||||
* it as it is.
|
||||
*
|
||||
* The passed in 'doms_new' should be kmalloc'd. This routine takes
|
||||
* ownership of it and will kfree it when done with it. If the caller
|
||||
* The passed in 'doms_new' should be kmalloc'd. This routine takes
|
||||
* ownership of it and will kfree it when done with it. If the caller
|
||||
* failed the kmalloc call, then it can pass in doms_new == NULL,
|
||||
* and partition_sched_domains() will fallback to the single partition
|
||||
* 'fallback_doms'.
|
||||
|
|
@ -6653,7 +6656,7 @@ int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
|
|||
#endif
|
||||
|
||||
/*
|
||||
* Force a reinitialization of the sched domains hierarchy. The domains
|
||||
* Force a reinitialization of the sched domains hierarchy. The domains
|
||||
* and groups cannot be updated in place without racing with the balancing
|
||||
* code, so we temporarily attach all running cpus to the NULL domain
|
||||
* which will prevent rebalancing while the sched domains are recalculated.
|
||||
|
|
@ -6943,8 +6946,8 @@ struct task_struct *curr_task(int cpu)
|
|||
* @p: the task pointer to set.
|
||||
*
|
||||
* Description: This function must only be used when non-maskable interrupts
|
||||
* are serviced on a separate stack. It allows the architecture to switch the
|
||||
* notion of the current task on a cpu in a non-blocking manner. This function
|
||||
* are serviced on a separate stack. It allows the architecture to switch the
|
||||
* notion of the current task on a cpu in a non-blocking manner. This function
|
||||
* must be called with all CPU's synchronized, and interrupts disabled, the
|
||||
* and caller must save the original value of the current task (see
|
||||
* curr_task() above) and restore that value before reenabling interrupts and
|
||||
|
|
@ -7193,16 +7196,17 @@ cpu_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cgrp)
|
|||
return &tg->css;
|
||||
}
|
||||
|
||||
static void cpu_cgroup_destroy(struct cgroup_subsys *ss,
|
||||
struct cgroup *cgrp)
|
||||
static void
|
||||
cpu_cgroup_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
|
||||
{
|
||||
struct task_group *tg = cgroup_tg(cgrp);
|
||||
|
||||
sched_destroy_group(tg);
|
||||
}
|
||||
|
||||
static int cpu_cgroup_can_attach(struct cgroup_subsys *ss,
|
||||
struct cgroup *cgrp, struct task_struct *tsk)
|
||||
static int
|
||||
cpu_cgroup_can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
|
||||
struct task_struct *tsk)
|
||||
{
|
||||
/* We don't support RT-tasks being in separate groups */
|
||||
if (tsk->sched_class != &fair_sched_class)
|
||||
|
|
@ -7308,8 +7312,8 @@ static struct cgroup_subsys_state *cpuacct_create(
|
|||
}
|
||||
|
||||
/* destroy an existing cpu accounting group */
|
||||
static void cpuacct_destroy(struct cgroup_subsys *ss,
|
||||
struct cgroup *cont)
|
||||
static void
|
||||
cpuacct_destroy(struct cgroup_subsys *ss, struct cgroup *cont)
|
||||
{
|
||||
struct cpuacct *ca = cgroup_ca(cont);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue