linux-kernel - Re: [PATCH] intel_pstate: allow to be built as module and handle Sun server power capping.

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Message-ID: <546B0412.8060102@oracle.com>
Date:	Tue, 18 Nov 2014 16:32:18 +0800
From:	ethan zhao <ethan.zhao@...cle.com>
To:	Ethan Zhao <ethan.zhao@...cle.com>
CC:	dirk.j.brandewie@...el.com, viresh.kumar@...aro.org,
	rjw@...ysocki.net, corbet@....net, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	ethan.kernel@...il.com, joe.jin@...cle.com, brian.maly@...cle.com
Subject: Re: [PATCH] intel_pstate: allow to be built as module and handle
 Sun server power capping.

Sorry, I missed the -n to git format-patch,
please ignore this patch.

Thanks,
Ethan

On 2014/11/18 16:27, Ethan Zhao wrote:
>    Oracle Sun servers(X86) have power capping features that work via ACPI _PPC method,
> patch No.1 is used to skip this driver if Oracle Sun server and _PPC detected. patch
> No.2 is used to allow the driver to be configured and built as a module, so provide
> the flexibility of configuration by userland. patch No.3 introduce a module parameter
> and a kernel command line parameter, let user could force it loaded even on Oracle Sun
> Servers(X86), that will be useful for debug\test\workaround etc purpose.
>
> These patches have been tested on Oracle Sun server X4-2 series with following
> cases on stable v3.18-rc3.
>
>    a. Configure and build  intel_pstate as builtin.
>       Boot without any kernel line parameter.
>       Boot with intel_pstate=ignore_acpi_ppc.
>    b. Configure and build intel_pstate as module.
>       Load intel_pstate drive without any module parameter.
>       Load intel_pstate driver with ignore_acpi_ppc=1
>
> These cases passed and work fine.
> --
> Brian Maly (1):
>    intel_pstate: allow driver to be built as a module
>
> Ethan Zhao (2):
>    intel_pstate: skip the driver if Sun server has ACPI _PPC method
>    intel_pstate: add module and kernel command line parameter to ignore
>      ACPI _PPC
>
>   Documentation/kernel-parameters.txt |  3 +++
>   drivers/cpufreq/Kconfig.x86         |  2 +-
>   drivers/cpufreq/intel_pstate.c      | 32 ++++++++++++++++++++++++++++++++
>   3 files changed, 36 insertions(+), 1 deletion(-)
>

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