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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-01-31 02:23:19 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-03-31 22:34:07 +0200 |
| commit | e2fd9d35847d1936398d44c4df68dceb3d7f64e7 (patch) | |
| tree | 1893e200e6f5e87065b38fedfc9f74d19a4079b7 /kernel/rcu/tree.h | |
| parent | rcu: Add expedited-grace-period event tracing (diff) | |
| download | linux-e2fd9d35847d1936398d44c4df68dceb3d7f64e7.tar.xz linux-e2fd9d35847d1936398d44c4df68dceb3d7f64e7.zip | |
rcu: Remove expedited GP funnel-lock bypass
Commit #cdacbe1f91264 ("rcu: Add fastpath bypassing funnel locking")
turns out to be a pessimization at high load because it forces a tree
full of tasks to wait for an expedited grace period that they probably
do not need. This commit therefore removes this optimization.
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 | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index df668c0f9e64..ac9a7b0c36ae 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -388,7 +388,6 @@ struct rcu_data { struct rcu_head oom_head; #endif /* #ifdef CONFIG_RCU_FAST_NO_HZ */ struct mutex exp_funnel_mutex; - 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. */ |