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[V1,6/6] Documentation: introduce AMD Pstate Preferrd Core mode kernel command line options

Message ID 20230808081001.2215240-7-li.meng@amd.com (mailing list archive)
State New
Headers show
Series AMD Pstate Preferred Core | expand

Commit Message

Meng, Li (Jassmine) Aug. 8, 2023, 8:10 a.m. UTC
AMD Pstate driver support enable/disable Preferred core.
Default disabled on platforms supporting AMD Preferred Core.
Enable AMD Pstate Preferred Core with
"amd_prefcore=enable" added to the kernel command line.

Signed-off-by: Meng Li <li.meng@amd.com>
---
 Documentation/admin-guide/kernel-parameters.txt | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Mario Limonciello Aug. 8, 2023, 3:37 p.m. UTC | #1
On 8/8/2023 03:10, Meng Li wrote:
> AMD Pstate driver support enable/disable Preferred core.
> Default disabled on platforms supporting AMD Preferred Core.

Why default disabled?

Shouldn't this default enabled and then let users decide they don't want 
to use it if it's causing a problem for them?

> Enable AMD Pstate Preferred Core with
> "amd_prefcore=enable" added to the kernel command line.
> 
> Signed-off-by: Meng Li <li.meng@amd.com>
> ---
>   Documentation/admin-guide/kernel-parameters.txt | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 2de235d52fac..bc92e178431b 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -363,6 +363,11 @@
>   			  selects a performance level in this range and appropriate
>   			  to the current workload.
>   
> +	amd_prefcore=
> +			[X86]
> +			enable
> +			  Enable AMD Pstate Preferred Core.
> +
>   	amijoy.map=	[HW,JOY] Amiga joystick support
>   			Map of devices attached to JOY0DAT and JOY1DAT
>   			Format: <a>,<b>
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Patch

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 2de235d52fac..bc92e178431b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -363,6 +363,11 @@ 
 			  selects a performance level in this range and appropriate
 			  to the current workload.
 
+	amd_prefcore=
+			[X86]
+			enable
+			  Enable AMD Pstate Preferred Core.
+
 	amijoy.map=	[HW,JOY] Amiga joystick support
 			Map of devices attached to JOY0DAT and JOY1DAT
 			Format: <a>,<b>