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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2009-09-13 09:15:08 -0700
committerIngo Molnar <mingo@elte.hu>2009-09-18 00:05:53 +0200
commitbbe3eae8bb039b5ffd64a6e3d1a0deaa1f3cbae9 (patch)
tree8bfd6f7eed162bf271760cf0ef27047b93d23ff2 /init
parentb8d57a76d9f92aa63b4f12990da5697b17000b0c (diff)
downloadlinaro-lsk-bbe3eae8bb039b5ffd64a6e3d1a0deaa1f3cbae9.tar.gz
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/Kconfig3
1 files changed, 2 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 8e8b76d8a27..4c2c936afd2 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