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Date: Tue, 6 Nov 2001 11:37:24 -0800 (PST)
From: Patrick Mochel <mochel@osdl.org>
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To: Martin Eriksson <nitrax@giron.wox.org>
cc: <linux-kernel@vger.kernel.org>
Subject: Re: ACPI "hlt" mode and SMP systems?
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On Tue, 6 Nov 2001, Martin Eriksson wrote:

> When will the equivalence of "hlt" (in APM) work in ACPI SMP systems? Or
> does it already? I have a hard time decoding all the ACPI symbols, such as
> C1 C2 S0 S1 S2 S3 and so on...

"hlt" is equivalent to ACPI processor power state C1,

When ACPI is loaded, it replaces the idle function with its own
(drivers/acpi/ospm/processor/prpower.c::pr_power_idle() ), which places
the processors in lower power states gradually.

I once documented all of the states in a readable format. I will post it
once I get back from lunch...

	-pat

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