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rcu: Remove orphan/adopt event-tracing fields 

The rcu_node structure's ->n_cbs_orphaned and ->n_cbs_adopted fields
are updated, but never read.  This commit therefore removes them.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2017-06-23 20:30:08 -07:00
parent a2b2df207a
commit c47e067a3c
2 changed files with 0 additions and 4 deletions
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2
kernel/rcu/tree.c
View File

@ -3871,7 +3871,6 @@ rcu_send_cbs_to_orphanage(int cpu, struct rcu_state *rsp,
* because _rcu_barrier() excludes CPU-hotplug operations, so it
* cannot be running now. Thus no memory barrier is required.
*/
rdp->n_cbs_orphaned += rcu_segcblist_n_cbs(&rdp->cblist);
rcu_segcblist_extract_count(&rdp->cblist, &rsp->orphan_done);
/*
@ -3910,7 +3909,6 @@ static void rcu_adopt_orphan_cbs(struct rcu_state *rsp, unsigned long flags)
return;
/* Do the accounting first. */
rdp->n_cbs_adopted += rsp->orphan_done.len;
if (rsp->orphan_done.len_lazy != rsp->orphan_done.len)
rcu_idle_count_callbacks_posted();
rcu_segcblist_insert_count(&rdp->cblist, &rsp->orphan_done);

2
kernel/rcu/tree.h
View File

@ -219,8 +219,6 @@ struct rcu_data {
/* qlen at last check for QS forcing */
unsigned long n_cbs_invoked; /* count of RCU cbs invoked. */
unsigned long n_nocbs_invoked; /* count of no-CBs RCU cbs invoked. */
unsigned long n_cbs_orphaned; /* RCU cbs orphaned by dying CPU */
unsigned long n_cbs_adopted; /* RCU cbs adopted from dying CPU */
unsigned long n_force_qs_snap;
/* did other CPU force QS recently? */
long blimit; /* Upper limit on a processed batch */