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rcu: Add expedited-grace-period event tracing

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Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2016-01-28 20:49:49 -08:00
parent bea2de44ae
commit 4f41530245
2 changed files with 16 additions and 7 deletions
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3
kernel/rcu/tree_plugin.h
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@@ -750,12 +750,14 @@ void synchronize_rcu_expedited(void)
}
s = rcu_exp_gp_seq_snap(rsp);
trace_rcu_exp_grace_period(rsp->name, s, TPS("snap"));
rnp_unlock = exp_funnel_lock(rsp, s);
if (rnp_unlock == NULL)
return; /* Someone else did our work for us. */
rcu_exp_gp_seq_start(rsp);
trace_rcu_exp_grace_period(rsp->name, s, TPS("start"));
/* Initialize the rcu_node tree in preparation for the wait. */
sync_rcu_exp_select_cpus(rsp, sync_rcu_exp_handler);
@@ -766,6 +768,7 @@ void synchronize_rcu_expedited(void)
/* Clean up and exit. */
rcu_exp_gp_seq_end(rsp);
trace_rcu_exp_grace_period(rsp->name, s, TPS("end"));
mutex_unlock(&rnp_unlock->exp_funnel_mutex);
trace_rcu_exp_funnel_lock(rsp->name, rnp_unlock->level,
rnp_unlock->grplo, rnp_unlock->grphi,