diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2009-09-13 18:15:08 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-18 00:05:53 +0200 |
| commit | bbe3eae8bb039b5ffd64a6e3d1a0deaa1f3cbae9 (patch) | |
| tree | 8bfd6f7eed162bf271760cf0ef27047b93d23ff2 /init | |
| parent | rcutorture: Occasionally delay readers enough to make RCU force_quiescent_state (diff) | |
| download | linux-bbe3eae8bb039b5ffd64a6e3d1a0deaa1f3cbae9.tar.xz linux-bbe3eae8bb039b5ffd64a6e3d1a0deaa1f3cbae9.zip | |
rcu: Kconfig help needs to say that TREE_PREEMPT_RCU scales down
To quote Valdis:
This leaves somebody who has a laptop wondering which
choice is best for a system with only one or two cores that
has CONFIG_PREEMPT defined. One choice says it scales down
nicely, the other explicitly has a 'depends on PREEMPT'
attached to it...
So add "scales down nicely" to TREE_PREEMPT_RCU to match that of
TREE_RCU.
Suggested-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
LKML-Reference: <12528585112362-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig index 8e8b76d8a272..4c2c936afd2d 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -331,7 +331,8 @@ config TREE_PREEMPT_RCU This option selects the RCU implementation that is designed for very large SMP systems with hundreds or thousands of CPUs, but for which real-time response - is also required. + is also required. It also scales down nicely to + smaller systems. endchoice |