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>
diff --git a/init/Kconfig b/init/Kconfig
index 8e8b76d..4c2c936 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -331,7 +331,8 @@
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