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rcu: Remove obsolete force-quiescent-state statistics for debugfs
The debugfs interface displayed statistics on RCU-pending checks but this interface has since been removed. This commit therefore removes the no-longer-used rcu_state structure's ->n_force_qs_lh and ->n_force_qs_ngp fields along with their updates. (Though the ->n_force_qs_ngp field was actually not used at all, embarrassingly enough.) If this information proves necessary in the future, the corresponding event traces will be added. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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parent
01c495f72a
commit
d62df57370
2 changed files with 1 additions and 8 deletions
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@ -2844,10 +2844,8 @@ static void force_quiescent_state(struct rcu_state *rsp)
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!raw_spin_trylock(&rnp->fqslock);
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if (rnp_old != NULL)
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raw_spin_unlock(&rnp_old->fqslock);
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if (ret) {
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rsp->n_force_qs_lh++;
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if (ret)
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return;
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}
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rnp_old = rnp;
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}
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/* rnp_old == rcu_get_root(rsp), rnp == NULL. */
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@ -2856,7 +2854,6 @@ static void force_quiescent_state(struct rcu_state *rsp)
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raw_spin_lock_irqsave_rcu_node(rnp_old, flags);
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raw_spin_unlock(&rnp_old->fqslock);
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if (READ_ONCE(rsp->gp_flags) & RCU_GP_FLAG_FQS) {
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rsp->n_force_qs_lh++;
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raw_spin_unlock_irqrestore_rcu_node(rnp_old, flags);
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return; /* Someone beat us to it. */
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}
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@ -355,10 +355,6 @@ struct rcu_state {
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/* kthreads, if configured. */
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unsigned long n_force_qs; /* Number of calls to */
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/* force_quiescent_state(). */
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unsigned long n_force_qs_lh; /* ~Number of calls leaving */
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/* due to lock unavailable. */
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unsigned long n_force_qs_ngp; /* Number of calls leaving */
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/* due to no GP active. */
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unsigned long gp_start; /* Time at which GP started, */
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/* but in jiffies. */
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unsigned long gp_activity; /* Time of last GP kthread */
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