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Date: Thu, 21 Jun 2012 07:56:24 +0200
From: Brice Goglin <brice.goglin@gmail.com>
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To: Yinghai Lu <yinghai@kernel.org>
CC: Bjorn Helgaas <bhelgaas@google.com>,
	Ulrich Drepper <drepper@gmail.com>, jbarnes@virtuousgeek.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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Subject: Re: SNB PCI root information
References: <CAOPLpQfUm-2ENkbnYfXEn1nf9FHnaRk3aqQTSTBWb-CsfCUCFA@mail.gmail.com> <CAE9FiQU=Uvj_OFYQLdddf8j59vE7D0aE9cdNZv7P8_Rn7=MmUQ@mail.gmail.com> <CAErSpo57H_ZD_-Z8z9vD3c50My4Rejtc9gXXrxGxDtQomYmrSA@mail.gmail.com> <CAOPLpQeJTfB2UNy3O9FgRCyZb=LyMqd0SOsz7qDM0Ur_sfeNhg@mail.gmail.com> <CAE9FiQVzKr+nyBh=8-v+HEDF=7JqN2CqdTNx1=LHTq=c_OyZvg@mail.gmail.com> <CAErSpo40SDii6PTNisAnsn6SoB7SzPUGztWAg9vaZZv+ByQsPw@mail.gmail.com> <CAE9FiQVDnS9n28GQrKVVTU7GiMtJZLFN1T9vmOm5oSysvMEVhQ@mail.gmail.com> <CAErSpo4x8+M6hGAqJR2rjGEGk2AnnZfJkmaJrJedzhnKiRf2qw@mail.gmail.com> <CAOPLpQchY4gMYaw-Ew5uujD9JCu==VLjQ7Z_OjrT6akTgX4+iA@mail.gmail.com> <CAErSpo6JWKoFcbsLnyzPGXLKssobfudjcYMvYzfEpYZ-bzCHPg@mail.gmail.com> <CAE9FiQWOUZhUQYc66ceG5EMWQ0uO7L3odh0+XwRsLV2Bza2ZpQ@mail.gmail.com> <4FE22B28.9020402@gmail.com> <CAE9FiQUkGCQ0Y=n3i=bq388T8N-vrHP2LtMTFGwry2nA+uppwA@mail.gmail.com>
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Le 21/06/2012 04:43, Yinghai Lu a écrit :
> On Wed, Jun 20, 2012 at 12:57 PM, Brice Goglin <brice.goglin@gmail.com> wrote:
>> Le 20/06/2012 21:28, Yinghai Lu a écrit :
>>> On Wed, Jun 20, 2012 at 11:46 AM, Bjorn Helgaas <bhelgaas@google.com> wrote:
>> I agree that the most common problem is that _PXM is missing. But I've
>> seen at least some HP Westmere-EP platforms where _PXM exists but it is
>> wrong. Last time we checked, there was no BIOS update, even if we
>> reported the bug a while ago.
>>
> Do you have boot log or acpi dump?
>
> I suspected that could be other problem. intel system before
> sandbridge does not have IIO.
> they will have ioh instead, and one ioh would connect to two cpu sockets.
> but _PXM for root bus in dsdt only can return one value. Aka it is
> acpi spec limitation.

The machines I am talking about have two IOHs (one connected to each
socket). I only have an old 2.6.27 boot log at hand, I'll ask my admins
for more. Do you want the 2.6.27 dmesg anyway?

Brice