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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-07-11 16:24:45 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-07-17 14:59:06 -0700 |
| commit | cdacbe1f91264687af956e810278030f2ab5a3d0 (patch) | |
| tree | 3a4e912e5c319329bc2a1e68b99ee041f0777150 /kernel/rcu/tree_trace.c | |
| parent | rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS (diff) | |
| download | linux-dev-cdacbe1f91264687af956e810278030f2ab5a3d0.tar.xz linux-dev-cdacbe1f91264687af956e810278030f2ab5a3d0.zip | |
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.c | 4 |
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), |