FS#11791 - [kernel26] Please disable CONFIG_IRQBALANCE
Attached to Project:
Arch Linux
Opened by Swift Geek (swiftgeek) - Friday, 17 October 2008, 23:08 GMT
Last edited by Tobias Powalowski (tpowa) - Sunday, 26 October 2008, 20:40 GMT
Opened by Swift Geek (swiftgeek) - Friday, 17 October 2008, 23:08 GMT
Last edited by Tobias Powalowski (tpowa) - Sunday, 26 October 2008, 20:40 GMT
|
Details
Please disable CONFIG_IRQBALANCE in kernel config
PowerTOP: "Suggestion: Disable the CONFIG_IRQBALANCE kernel configuration option. The in-kernel irq balancer is obsolete and wakes the CPU up far more than needed." |
This task depends upon
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@suse.cz>
---
commit 2665f7971b5b97830b028308553a78a95c131988
tree e1782cceebfb5900373469c0043d113de88f861f
parent f5085f6ea1c5771708c44a4a42ee217e760ff4a0
author Pavel <pavel@amd.ucw.cz> Tue, 23 Oct 2007 13:56:15 +0200
committer Pavel <pavel@amd.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