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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-07-11 16:24:45 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-07-17 14:59:06 -0700
commitcdacbe1f91264687af956e810278030f2ab5a3d0 (patch)
tree3a4e912e5c319329bc2a1e68b99ee041f0777150 /kernel/rcu/tree_trace.c
parent32bb1c79996069ef9e4e53b428050749f9841c3f (diff)
rcu: Add fastpath bypassing funnel locking
In the common case, there will be only one expedited grace period in the system at a given time, in which case it is not helpful to use funnel locking. This commit therefore adds a fastpath that bypasses funnel locking when the root ->exp_funnel_mutex is not held. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree_trace.c')
-rw-r--r--kernel/rcu/tree_trace.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcu/tree_trace.c b/kernel/rcu/tree_trace.c
index ec62369f1b02..6fc4c5ff3bb5 100644
--- a/kernel/rcu/tree_trace.c
+++ b/kernel/rcu/tree_trace.c
@@ -185,9 +185,9 @@ static int show_rcuexp(struct seq_file *m, void *v)
{
struct rcu_state *rsp = (struct rcu_state *)m->private;
- seq_printf(m, "t=%lu tf=%lu wd1=%lu wd2=%lu wd3=%lu n=%lu enq=%d sc=%lu\n",
+ seq_printf(m, "s=%lu wd0=%lu wd1=%lu wd2=%lu wd3=%lu n=%lu enq=%d sc=%lu\n",
rsp->expedited_sequence,
- atomic_long_read(&rsp->expedited_tryfail),
+ atomic_long_read(&rsp->expedited_workdone0),
atomic_long_read(&rsp->expedited_workdone1),
atomic_long_read(&rsp->expedited_workdone2),
atomic_long_read(&rsp->expedited_workdone3),