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

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Date:	Fri, 13 Apr 2012 09:23:37 -0600
From:	Shuah Khan <shuahkhan@...il.com>
To:	Jiang Liu <liuj97@...il.com>
Cc:	shuahkhan@...il.com, Toshi Kani <toshi.kani@...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 Fri, 2012-04-13 at 22:24 +0800, Jiang Liu wrote:
> Hi Shuah and Toshi,
> 	As I can tell, _OST method has been defined in ACPI4.0 spec and
> there are some platforms already implemented the _OST method. For example,
> Quanta QSSC-S4R server implements _OST for hot-pluggable PCI slots, but 
> it's a little pity that it doesn't implement _OST for the memory board,
> so we can't test Toshi's patch on that platform.
> 	According to my understanding, other than notifying BIOS about the
> event processing result, _OST could also be used to notify BIOS about the
> IN_PROGRESS state, so BIOS could track the event handling progress and avoid
> timeout. We have used _OST method to avoid timeout on one of our prototype
> platforms.

Thanks Jiang. This is good information about _OST method's timeout
use-case. Alos good to know there are platforms out there that already
implement it. Too bad you don't have any platforms to test Toshis's
patch. Maybe there are others that have one available.

-- Shuah


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