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Date:      Tue, 28 Feb 2012 15:04:55 -0800
From:      Adrian Chadd <adrian@freebsd.org>
To:        Harry Newton <hn@yewbarrow.net>
Cc:        Ian Lepore <freebsd@damnhippie.dyndns.org>, freebsd-stable@freebsd.org, jhb@freebsd.org
Subject:   Re: Regression between 9-RELEASE and 9-STABLE [PCIB ?]
Message-ID:  <CAJ-Vmo=T9X_9aSKneG9Fo7hdTStb=L-kVS4cCMri-XpaHYaoMw@mail.gmail.com>
In-Reply-To: <CAKAm69HeLfTNvw79yikwrKC7e08xgHHd_4Bfc3RCfxX7Zau8dg@mail.gmail.com>
References:  <CAKAm69EPHB_0DrSdCvNTeOnoRhAHjMtWSF-520oGRppJ=KKjrg@mail.gmail.com> <1330459721.1023.15.camel@revolution.hippie.lan> <CAKAm69HeLfTNvw79yikwrKC7e08xgHHd_4Bfc3RCfxX7Zau8dg@mail.gmail.com>

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A lot of the PCI bus enumeration and configuration code has changed.

John's likely the best person to bring into this. He's been doing a
lot of the PCI bus hacking and has found/fixed quite a few
regressions.

Good luck!



Adrian


On 28 February 2012 14:26, Harry Newton <hn@yewbarrow.net> wrote:
> Not really. Verbose suggests it completes the scan of the PCI to LPC
> Bridge and PCI to PCI bridge. Comparing with a working verbose boot,
> the next stage, which isn't reached, is HyperTransport Technology
> Configuration.
>
> Trying BUS_DEBUG, I got a lot of this:
>
> device_add_child_ordered: 1813: (null) at pci with orer 0 as unit -1
> make_device: 1698: (null) at pci as unit -1
>
> I neglected to say before: the machine's been running FreeBSD 7-STABLE
> quite happily with no problems.
>
> - Harry
>
>
> On 28 February 2012 20:08, Ian Lepore <freebsd@damnhippie.dyndns.org> wro=
te:
>> On Tue, 2012-02-28 at 19:15 +0000, Harry Newton wrote:
>>> 9-RELEASE works fine. csup to 9-STABLE and make buildworld kernel etc
>>> gives a system the hangs during the boot process. There are no error
>>> messages during the part boot, and no panic. Last messages before hang
>>> are:
>>>
>>> pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
>>> pci0: <ACPI PCI bus> on pcib0
>>>
>>> I am stumped about how to diagnose this, and would be _very_ grateful
>>> for any suggestions.
>>>
>>> When it's hung I can't force a break to debugger (BREAK_TO_DEBUGGER)
>>> in kern conf: I imagine I'm too early in the boot sequence.
>>>
>>> - Harry
>>>
>>
>> I assume booting verbose doesn't provide any more clues? =A0I've sometim=
es
>> gotten an extra clue from a hang during boot by building with option
>> BUS_DEBUG. =A0Even if you don't suspect the newbus routines as directly
>> being the problem, sometimes you get a bit more info about what was
>> happening at the time of lockup.
>>
>> -- Ian
>>
>>
>
>
>
> --
> Harry Newton
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> freebsd-stable@freebsd.org mailing list
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