linux-kernel - Re: [PATCH] x86,pci: dmi check for mackpro 2.2 mmconf

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Date:	Wed, 23 Jul 2008 09:54:16 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Jack Howarth <howarth@...mo.msbb.uc.edu>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86,pci: dmi check for mackpro 2.2 mmconf

On Tue, 2008-07-22 at 21:41 -0400, Jack Howarth wrote:
> Jesse,
>    The file /sys/module/pcie_aspm/parameters/policy
> shows...
> 
> [default] performance powersave 
you can observe a sysfs file 'link_state' under a pci root port.
/sys/device/...pcixxx/power/link_state.
if there is no such file for the port, then aspm is disabled for the
port.

> Reading the original patch, I don't quite see how it would
> show the aspm as disabled. I would think the current ASPM
> fix patch should be modified to output a kernel message that
> ASPM is being disabled because of pre-1.1 PCIe devices
> when it does that (assuming it is disabling across the
> board and not just for a specific device on the bus).
ok, I'll do this.

Thanks,
SHaohua

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