ACPI: Create "idle=halt" bootparam
authorZhao Yakui <yakui.zhao@intel.com>
Tue, 24 Jun 2008 09:58:53 +0000 (17:58 +0800)
committerAndi Kleen <andi@basil.nowhere.org>
Wed, 16 Jul 2008 21:27:05 +0000 (23:27 +0200)
commitc1e3b377ad48febba6f91b8ae42c44ee4d4ab45e
tree7893e4226f52c4001150066f544415c1b17741f5
parent5b53496a5ad79e91052f72761a7c5516b069bc99
ACPI: Create "idle=halt" bootparam

"idle=halt" limits the idle loop to using
the halt instruction.  No MWAIT, no IO accesses,
no C-states deeper than C1.

If something is broken in the idle code,
"idle=halt" is a less severe workaround
than "idle=poll" which disables all power savings.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Documentation/kernel-parameters.txt
arch/ia64/kernel/process.c
arch/x86/kernel/process.c
drivers/acpi/processor_idle.c
include/asm-ia64/processor.h
include/asm-x86/processor.h