Regression between 9-RELEASE and 9-STABLE [PCIB ?]

Adrian Chadd adrian at
Tue Feb 28 23:04:58 UTC 2012

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

Good luck!


On 28 February 2012 14:26, Harry Newton <hn at> 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 at> wrote:
>> 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?  I've sometimes
>> gotten an extra clue from a hang during boot by building with option
>> BUS_DEBUG.  Even 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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