| commit | c1e3b377ad48febba6f91b8ae42c44ee4d4ab45e | |
| author | Zhao Yakui <yakui.zhao@intel.com> | |
| Tue, 24 Jun 2008 09:58:53 +0000 (24 17:58 +0800) | ||
| committer | Andi Kleen <andi@basil.nowhere.org> | |
| Wed, 16 Jul 2008 21:27:05 +0000 (16 23:27 +0200) | ||
| tree | 7893e4226f52c4001150066f544415c1b17741f5 | treesnapshot (tar.gz zip) |
| parent | 5b53496a5ad79e91052f72761a7c5516b069bc99 | commitdiff |
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>
"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>