rcu_accelerate_cbs

Name:If there is room, assign a ->gp_seq number to any callbacks on this* CPU that have not already been assigned

Proto:static bool rcu_accelerate_cbs(struct rcu_node *rnp, struct rcu_data *rdp)

Type:bool

Parameter:

Type	Parameter	Name
struct rcu_node *	rnp
struct rcu_data *	rdp

1282

bool ret = false

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rcu_lockdep_assert_cblist_protected(rdp)

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raw_lockdep_assert_held_rcu_node(rnp)

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If Not Does the specified rcu_segcblist structure contain callbacks that* are still pending, that is, not yet ready to be invoked? Then Return false

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gp_seq_req = _seq_snap - Take a snapshot of the update side's sequence number.* This function returns the earliest value of the grace-period sequence number* that will indicate that a full grace period has elapsed since the current* time

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If "Accelerate" callbacks based on more-accurate grace-period information Then ret = _start_this_gp - Request the start of a particular grace period*@rnp_start: The leaf node of the CPU from which to start

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If Are all segments following the specified segment of the specified* rcu_segcblist structure empty of callbacks? (The specified* segment might well contain callbacks.) Then trace_rcu_grace_period(Name of structure. , Track rsp->rcu_gp_seq counter. , Strings used in tracepoints need to be exported via the* tracing system such that tools like perf and trace-cmd can* translate the string address pointers to actual text.("AccWaitCB"))

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Else trace_rcu_grace_period(Name of structure. , Track rsp->rcu_gp_seq counter. , Strings used in tracepoints need to be exported via the* tracing system such that tools like perf and trace-cmd can* translate the string address pointers to actual text.("AccReadyCB"))

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Return ret

**Caller**
Name	Describe
rcu_accelerate_cbs_unlocked	Similar to rcu_accelerate_cbs(), but does not require that the leaf* rcu_node structure's ->lock be held
rcu_advance_cbs	Move any callbacks whose grace period has completed to the* RCU_DONE_TAIL sublist, then compact the remaining sublists and* assign ->gp_seq numbers to any callbacks in the RCU_NEXT_TAIL* sublist. This function is idempotent, so it does not hurt to
__note_gp_changes	Update CPU-local rcu_data state to record the beginnings and ends of* grace periods. The caller must hold the ->lock of the leaf rcu_node* structure corresponding to the current CPU, and must have irqs disabled.
rcu_gp_cleanup	Clean up after the old grace period.
rcu_report_qs_rdp	Record a quiescent state for the specified CPU to that CPU's rcu_data* structure. This must be called from the specified CPU.

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