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| author | Paul E. McKenney | 2015-07-12 01:24:45 +0200 |
|---|---|---|
| committer | Paul E. McKenney | 2015-07-17 23:59:06 +0200 |
| commit | cdacbe1f91264687af956e810278030f2ab5a3d0 (patch) | |
| tree | 3a4e912e5c319329bc2a1e68b99ee041f0777150 /kernel/rcu/tree.h | |
| parent | rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS (diff) | |
| download | kernel-qcow2-linux-cdacbe1f91264687af956e810278030f2ab5a3d0.tar.gz kernel-qcow2-linux-cdacbe1f91264687af956e810278030f2ab5a3d0.tar.xz kernel-qcow2-linux-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.h')
| -rw-r--r-- | kernel/rcu/tree.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 543ba726396c..80d974df0ea0 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -493,7 +493,7 @@ struct rcu_state { /* End of fields guarded by barrier_mutex. */ unsigned long expedited_sequence; /* Take a ticket. */ - atomic_long_t expedited_tryfail; /* # acquisition failures. */ + atomic_long_t expedited_workdone0; /* # done by others #0. */ atomic_long_t expedited_workdone1; /* # done by others #1. */ atomic_long_t expedited_workdone2; /* # done by others #2. */ atomic_long_t expedited_workdone3; /* # done by others #3. */ |