tree 7893e4226f52c4001150066f544415c1b17741f5
parent 5b53496a5ad79e91052f72761a7c5516b069bc99
author Zhao Yakui <yakui.zhao@intel.com> 1214301533 +0800
committer Andi Kleen <andi@basil.nowhere.org> 1216243625 +0200

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>