sched: Make set_*_buddy() work on non-task entities
Make set_*_buddy() work on non-task sched_entity, to facilitate the use of next_buddy to cache a group entity in cases where one of the tasks within that entity sleeps or gets preempted. set_skip_buddy() was incorrectly comparing the policy of task that is yielding to be not equal to SCHED_IDLE. Yielding should happen even when task yielding is SCHED_IDLE. This change removes the policy check on the yielding task. Signed-off-by: Venkatesh Pallipadi <venki@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1302744070-30079-2-git-send-email-venki@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -1846,26 +1846,26 @@ wakeup_preempt_entity(struct sched_entity *curr, struct sched_entity *se)
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static void set_last_buddy(struct sched_entity *se)
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{
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if (likely(task_of(se)->policy != SCHED_IDLE)) {
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if (entity_is_task(se) && unlikely(task_of(se)->policy == SCHED_IDLE))
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return;
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for_each_sched_entity(se)
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cfs_rq_of(se)->last = se;
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}
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}
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static void set_next_buddy(struct sched_entity *se)
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{
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if (likely(task_of(se)->policy != SCHED_IDLE)) {
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if (entity_is_task(se) && unlikely(task_of(se)->policy == SCHED_IDLE))
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return;
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for_each_sched_entity(se)
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cfs_rq_of(se)->next = se;
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}
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}
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static void set_skip_buddy(struct sched_entity *se)
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{
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if (likely(task_of(se)->policy != SCHED_IDLE)) {
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for_each_sched_entity(se)
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cfs_rq_of(se)->skip = se;
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}
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}
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/*
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