diff options
| author | Pranith Kumar <bobby.prani@gmail.com> | 2014-09-22 14:00:48 -0400 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-10-29 13:20:05 -0400 |
| commit | 28f6569ab7d036cd4ee94c26bb76dc1b3f3fc056 (patch) | |
| tree | dd09624ed00e1f67fdd87bf670da19761ed78ea6 /Documentation/RCU/rcu.txt | |
| parent | 21871d7eff2c96ae67e18e00adf59d56940e2fcc (diff) | |
rcu: Remove redundant TREE_PREEMPT_RCU config option
PREEMPT_RCU and TREE_PREEMPT_RCU serve the same function after
TINY_PREEMPT_RCU has been removed. This patch removes TREE_PREEMPT_RCU
and uses PREEMPT_RCU config option in its place.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/RCU/rcu.txt')
| -rw-r--r-- | Documentation/RCU/rcu.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/RCU/rcu.txt b/Documentation/RCU/rcu.txt index bf778332a28f..745f429fda79 100644 --- a/Documentation/RCU/rcu.txt +++ b/Documentation/RCU/rcu.txt | |||
| @@ -36,7 +36,7 @@ o How can the updater tell when a grace period has completed | |||
| 36 | executed in user mode, or executed in the idle loop, we can | 36 | executed in user mode, or executed in the idle loop, we can |
| 37 | safely free up that item. | 37 | safely free up that item. |
| 38 | 38 | ||
| 39 | Preemptible variants of RCU (CONFIG_TREE_PREEMPT_RCU) get the | 39 | Preemptible variants of RCU (CONFIG_PREEMPT_RCU) get the |
| 40 | same effect, but require that the readers manipulate CPU-local | 40 | same effect, but require that the readers manipulate CPU-local |
| 41 | counters. These counters allow limited types of blocking within | 41 | counters. These counters allow limited types of blocking within |
| 42 | RCU read-side critical sections. SRCU also uses CPU-local | 42 | RCU read-side critical sections. SRCU also uses CPU-local |
| @@ -81,7 +81,7 @@ o I hear that RCU is patented? What is with that? | |||
| 81 | o I hear that RCU needs work in order to support realtime kernels? | 81 | o I hear that RCU needs work in order to support realtime kernels? |
| 82 | 82 | ||
| 83 | This work is largely completed. Realtime-friendly RCU can be | 83 | This work is largely completed. Realtime-friendly RCU can be |
| 84 | enabled via the CONFIG_TREE_PREEMPT_RCU kernel configuration | 84 | enabled via the CONFIG_PREEMPT_RCU kernel configuration |
| 85 | parameter. However, work is in progress for enabling priority | 85 | parameter. However, work is in progress for enabling priority |
| 86 | boosting of preempted RCU read-side critical sections. This is | 86 | boosting of preempted RCU read-side critical sections. This is |
| 87 | needed if you have CPU-bound realtime threads. | 87 | needed if you have CPU-bound realtime threads. |