linux-kernel - Re: Suspend code ordering (again)

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Date:	Wed, 26 Dec 2007 18:24:06 +0300
From:	Alexey Starikovskiy <aystarik@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Carlos Corbacho <carlos@...angeworlds.co.uk>,
	"H. Peter Anvin" <hpa@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Len Brown <lenb@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: Suspend code ordering (again)

Rafael J. Wysocki wrote:
> On Wednesday, 26 of December 2007, Linus Torvalds wrote:
>   
>> On Tue, 25 Dec 2007, Rafael J. Wysocki wrote:
>>     
>>> the ACPI specification between versions 1.0x and 2.0.  Namely, while ACPI
>>> 2.0 and later wants us to put devices into low power states before calling
>>> _PTS, ACPI 1.0x wants us to do that after calling _PTS.  Since we're following
>>> the 2.0 and later specifications right now, we're not doing the right thing for
>>> the (strictly) ACPI 1.0x-compliant systems.
>>>
>>> We ought to be able to fix things on the high level, by calling _PTS earlier on
>>> systems that claim to be ACPI 1.0x-compliant.  That will require us to modify
>>> the generic susped code quite a bit and will need to be tested for some time.
>>>       
>> That's insane. Are you really saying that ACPI wants totally different 
>> orderings for different versions of the spec?
>>     
>
> Yes, I am.
>
>   
>> And does Windows really do that?
>>     
>
> I don't know.
>   
Windows was compliant only with 1.x spec until Vista.
With Vista claims are 3.x compliance.

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