diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-05-14 08:47:40 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-17 22:57:20 +0200 |
| commit | a738d897b7b03b83488ae74a9bc03d26a2875dc6 (patch) | |
| tree | a5eadb80fb893a36d3653fd9cfc0ba5acaa0e30b /arch/x86/kernel/pci-dma.c | |
| parent | f26a3988917913b3d11b2bd741601a2c64ab9204 (diff) | |
x86: remove mwait capability C-state check
Vegard Nossum reports:
| powertop shows between 200-400 wakeups/second with the description
| "<kernel IPI>: Rescheduling interrupts" when all processors have load (e.g.
| I need to run two busy-loops on my 2-CPU system for this to show up).
|
| The bisect resulted in this commit:
|
| commit 0c07ee38c9d4eb081758f5ad14bbffa7197e1aec
| Date: Wed Jan 30 13:33:16 2008 +0100
|
| x86: use the correct cpuid method to detect MWAIT support for C states
remove the functional effects of this patch and make mwait unconditional.
A future patch will turn off mwait on specific CPUs where that causes
power to be wasted.
Bisected-by: Vegard Nossum <vegard.nossum@gmail.com>
Tested-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/pci-dma.c')
0 files changed, 0 insertions, 0 deletions