bfq_update_next_in_service

Name:q_update_next_in_service - update sd->next_in_service*@sd: sched_data for which to perform the update

Proto:static bool bfq_update_next_in_service(struct bfq_sched_data *sd, struct bfq_entity *new_entity, bool expiration)

Type:bool

Parameter:

Type	Parameter	Name
struct bfq_sched_data *	sd
struct bfq_entity *	new_entity
bool	expiration

78

next_in_service = head-of-line entity (see comments above)

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bool parent_sched_may_change = false

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bool change_without_lookup = false

93

If new_entity && new_entity != head-of-line entity (see comments above) Then

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change_without_lookup = true

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If next_in_service Then

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new_entity_class_idx = bfq_class_idx(new_entity)

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st = array of service trees, one per ioprio_class + new_entity_class_idx

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change_without_lookup = new_entity_class_idx == bfq_class_idx(next_in_service) && Not q_gt - compare two timestamps.*@a: first ts.*@b: second ts.* Return @a > @b, dealing with wrapping correctly. && q_gt - compare two timestamps.*@a: first ts.*@b: second ts.* Return @a > @b, dealing with wrapping correctly.

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If change_without_lookup Then next_in_service = new_entity

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If Not change_without_lookup Then next_in_service = bfq_lookup_next_entity(sd, expiration)

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If next_in_service Then

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new_budget_triggers_change = bfq_update_parent_budget(next_in_service)

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parent_sched_may_change = Not head-of-line entity (see comments above) || new_budget_triggers_change

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head-of-line entity (see comments above) = next_in_service

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If Not next_in_service Then Return parent_sched_may_change

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Return parent_sched_may_change

**Caller**
Name	Describe
bfq_activate_requeue_entity	q_activate_requeue_entity - activate or requeue an entity representing a* bfq_queue, and activate, requeue or reposition* all ancestors for which such an update becomes* necessary
bfq_deactivate_entity	q_deactivate_entity - deactivate an entity representing a bfq_queue
bfq_get_next_queue	Get next queue for service.

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