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FromCon Kolivas <>
Subject[ckpatch][15/29] hz-no_default_250.patch
DateSun, 18 Jun 2006 17:32:48 +1000
Make 250 HZ a value that is not selected by default and give some better
recommendations in help.

Signed-off-by: Con Kolivas <kernel@kolivas.org>

 kernel/Kconfig.hz |   15 +++++++++------
 1 files changed, 9 insertions(+), 6 deletions(-)
Index: linux-ck-dev/kernel/Kconfig.hz
===================================================================
--- linux-ck-dev.orig/kernel/Kconfig.hz	2006-06-18 15:23:58.000000000 +1000
+++ linux-ck-dev/kernel/Kconfig.hz	2006-06-18 15:24:28.000000000 +1000
@@ -21,14 +21,17 @@ choice
 	help
 	  100 HZ is a typical choice for servers, SMP and NUMA systems
 	  with lots of processors that may show reduced performance if
-	  too many timer interrupts are occurring.
+	  too many timer interrupts are occurring. Laptops may also show
+	  improved battery life.
 
-	config HZ_250
+	config HZ_250_NODEFAULT
 		bool "250 HZ"
 	help
-	 250 HZ is a good compromise choice allowing server performance
-	 while also showing good interactive responsiveness even
-	 on SMP and NUMA systems.
+	 250 HZ is a lousy compromise choice allowing server interactivity
+	 while also showing desktop throughput and no extra power saving on
+	 laptops. Good for when you can't make up your mind.
+
+	 Recommend 100 or 1000 instead.
 
 	config HZ_1000
 		bool "1000 HZ"
@@ -41,6 +44,6 @@ endchoice
 config HZ
 	int
 	default 100 if HZ_100
-	default 250 if HZ_250
+	default 250 if HZ_250_NODEFAULT
 	default 1000 if HZ_1000
 
-- 
-ck
-
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