linux-kernel - Re: [PATCH 0/5] ACPI: Add _OST support for ACPI hotplug

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Message-ID: <1334161991.2226.18.camel@lorien2>
Date:	Wed, 11 Apr 2012 10:33:11 -0600
From:	Shuah Khan <shuahkhan@...il.com>
To:	Toshi Kani <toshi.kani@...com>
Cc:	shuahkhan@...il.com, lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] ACPI: Add _OST support for ACPI hotplug

On Tue, 2012-04-10 at 16:21 -0600, Toshi Kani wrote:
> This series of patches supports ACPI _OST (OSPM Status Indication)
> method for ACPI-based CPU and memory hotplug operations.  After
> ACPI-based hotplug operation completed, OSPM calls _OST to convey
> the completion status to ACPI firmware.  If _OST is not present,
> this change has no effect on the platform.
> 
> The _OST definition can be found in section 6.3.5 of ACPI 5.0 spec.
> The HPPF spec below also describes hotplug flows with _OST.
> 
>   DIG64 Hot-Plug & Partitioning Flow (HPPF) Specification R1.0
>   http://www.dig64.org/home/DIG64_HPPF_R1_0.pdf
> 
> The change was tested by overriding DSDT with fake _OST methods.

Could you please elaborate what it means by fake _OST method? I am
assuming based on the above that this patch set was never tested on real
hardware that has support for _OST method? Is that correct? If so why
not wait until you have the opportunity to test it on real hardware
before sending the patch?

-- Shuah
> 
> ---
> Toshi Kani (4):
>  ACPI: Set hotplug _OST support bit to _OSC
>  ACPI: Add acpi_evaluate_ost() for calling _OST
>  ACPI: Add _OST support for ACPI CPU hotplug
>  ACPI: Add _OST support for ACPI memory hotplug
> 
>  drivers/acpi/acpi_memhotplug.c  |   43 +++++++++++++++++++++++++++++----------
>  drivers/acpi/bus.c              |    5 ++++
>  drivers/acpi/processor_driver.c |   28 ++++++++++++++++++-------
>  drivers/acpi/utils.c            |   34 ++++++++++++++++++++++++++++++
>  include/acpi/acpi_bus.h         |    3 ++
>  include/linux/acpi.h            |   26 ++++++++++++++++++++++-
>  6 files changed, 119 insertions(+), 20 deletions(-)
> 
> --
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