lkml.org 
[lkml]   [2009]   [Sep]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:core/urgent] rcu: Kconfig help needs to say that TREE_PREEMPT_RCU scales down
Commit-ID:  bbe3eae8bb039b5ffd64a6e3d1a0deaa1f3cbae9
Gitweb: http://git.kernel.org/tip/bbe3eae8bb039b5ffd64a6e3d1a0deaa1f3cbae9
Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
AuthorDate: Sun, 13 Sep 2009 09:15:08 -0700
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Fri, 18 Sep 2009 00:05:53 +0200

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>


---
init/Kconfig | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 8e8b76d..4c2c936 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


\
 
 \ /
  Last update: 2009-09-18 00:13    [W:0.288 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site