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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-01-30 17:23:19 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-03-31 13:34:07 -0700
commite2fd9d35847d1936398d44c4df68dceb3d7f64e7 (patch)
tree1893e200e6f5e87065b38fedfc9f74d19a4079b7 /kernel/rcu/tree.h
parent4f41530245c7fd4837152e264d120d05ae940eb0 (diff)
downloadlinux-sh-e2fd9d35847d1936398d44c4df68dceb3d7f64e7.tar.gz
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.h1
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. */