linux-kernel - mark irqbalance not-recommended

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Message-ID: <20071023115709.GA1734@elf.ucw.cz>
Date:	Tue, 23 Oct 2007 13:57:09 +0200
From:	Pavel Machek <pavel@....cz>
To:	kernel list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Arjan van de Ven <arjan@...radead.org>
Subject: mark irqbalance not-recommended


Mark CONFIG_IRQBALANCE as not recommended any more. It eats too much
power, and better solutions are available in userspace.

Signed-off-by: Pavel Machek <pavel@...e.cz>

---
commit 2665f7971b5b97830b028308553a78a95c131988
tree e1782cceebfb5900373469c0043d113de88f861f
parent f5085f6ea1c5771708c44a4a42ee217e760ff4a0
author Pavel <pavel@....ucw.cz> Tue, 23 Oct 2007 13:56:15 +0200
committer Pavel <pavel@....ucw.cz> Tue, 23 Oct 2007 13:56:15 +0200

 arch/i386/Kconfig |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index eba2d88..10f3c38 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -779,10 +779,13 @@ config EFI
 config IRQBALANCE
  	bool "Enable kernel irq balancing"
 	depends on SMP && X86_IO_APIC
-	default y
+	default n
 	help
- 	  The default yes will allow the kernel to do irq load balancing.
-	  Saying no will keep the kernel from doing irq load balancing.
+ 	  Saying yes will allow the kernel to do irq load balancing;
+	  but it generates too many CPU wakeups, eating power, and
+	  is better done in userspace.
+
+	  Say N.
 
 # turning this on wastes a bunch of space.
 # Summit needs it only when NUMA is on

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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