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Date: Thu, 22 Jul 2010 11:57:53 -0400 (EDT)
From: Len Brown <lenb@kernel.org>
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To: Andi Kleen <andi@firstfloor.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>, "Yu, Luming" <luming.yu@intel.com>,
        Philip Langdale <philipl@overt.org>, Jeff Garrett <jeff@jgarrett.org>,
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Subject: Re: [PATCH] ACPI: make acpi_idle Nehalem-aware
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This patch is kaput.

As detailed in the bug report
https://bugzilla.kernel.org/show_bug.cgi?id=15886
we should be able to fix some of these boxes
by paying attention to an ACPI flag we didn't
realize  existed until yesterday.

I'll follow-up with a new patch today.

However, we'll still have issues with systems
like the HP DL360 G6 which explicity set the
flag to ask for BM_STS checking and configure
the chipset such that BM_STS is active.
That may require a BIOS fix, or we may
have to run intel_idle on that box --
since intel_idle ignores BM_STS always
and instead relies on drivers to use pm_qos
to register device latency constraints.

thanks,
Len Brown, Intel Open Source Technology Center