aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/kernel-parameters.txt
diff options
context:
space:
mode:
authorAndi Kleen <ak@suse.de>2007-05-02 13:27:12 -0400
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 13:27:12 -0400
commitf039b754714a422959027cb18bb33760eb8153f0 (patch)
treec5f28502adf35f5ea7738a974cd7c4fc81e1dd21 /Documentation/kernel-parameters.txt
parentc169859d6dfc7471ef9f2dbd720936e17906a084 (diff)
[PATCH] x86: Don't use MWAIT on AMD Family 10
It doesn't put the CPU into deeper sleep states, so it's better to use the standard idle loop to save power. But allow to reenable it anyways for benchmarking. I also removed the obsolete idle=halt on i386 Cc: andreas.herrmann@amd.com Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt11
1 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4287696f18dd..94ce0d20253d 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -695,8 +695,15 @@ and is between 256 and 4096 characters. It is defined in the file
695 idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed 695 idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed
696 See Documentation/ide.txt. 696 See Documentation/ide.txt.
697 697
698 idle= [HW] 698 idle= [X86]
699 Format: idle=poll or idle=halt 699 Format: idle=poll or idle=mwait
700 Poll forces a polling idle loop that can slightly improves the performance
701 of waking up a idle CPU, but will use a lot of power and make the system
702 run hot. Not recommended.
703 idle=mwait. On systems which support MONITOR/MWAIT but the kernel chose
704 to not use it because it doesn't save as much power as a normal idle
705 loop use the MONITOR/MWAIT idle loop anyways. Performance should be the same
706 as idle=poll.
700 707
701 ignore_loglevel [KNL] 708 ignore_loglevel [KNL]
702 Ignore loglevel setting - this will print /all/ 709 Ignore loglevel setting - this will print /all/