Problem adding more than 8 network adapters
Gustau Pérez i Querol
gperez at entel.upc.edu
Wed Aug 29 13:13:08 UTC 2012
Al 29/08/2012 14:13, En/na John Baldwin ha escrit:
> On Wednesday, August 29, 2012 6:12:02 am Peter Jeremy wrote:
>> [Moving to -stable and adding jhb@ for his input]
>> On 2012-Aug-29 11:32:44 +0200, Gustau Pérez i Querol <gperez at entel.upc.edu> wrote:
>>> Al 29/08/2012 11:02, En/na Peter Jeremy ha escrit:
>>>> On 2012-Aug-28 11:44:44 +0200, Gustau Pérez i Querol <gperez at entel.upc.edu> wrote:
>>>>> I'm running FreeBSD 9.1 RC1/AMD64 with VirtualBox. The problem I'm
>>>>> facing is that I can't use more than 8 network adapters plugged to the
>>>>> virtual machine.
>>>>> I don't know if it's a net@ problem or maybe it is a problem with
>>>>> the emulated PCI-bridge and then stable@ should be contacted. Also, I'm
>>>>> not sure if a real machine would support more than 8 network adapters or
>>>>> not. Any hints would be appreciated.
>>>> I don't think I've ever used more than 6 physical NICs in a host but don't
>>>> know of any reason for >8 to not work.
>>>> Can you please post a "pciconf -lv" from FreeBSD and the equivalent
>>>> "lspci" from Linux. A FreeBSD verbose boot log might also help.
>>> Sure. I'm attaching them to this mail. I hope the mailing list
>>> doesn't eat them. If it does, I will post them online and send the URL
>>> to the mailing list.
>> Ah.. lspci shows the 9th LANCE at 02:00.0. The verbose boot shows
>> FreeBSD finds pcib2 (at pci0 device 25.0) but doesn't see anything
>> on that bus. ISTR jhb@ will recognize that problem.
> Silly firmware, VM, whatever it is. :) It's buggy.
>>> pcib1: <PCI-PCI bridge> at device 24.0 on pci0
>>> pcib1: domain 0
>>> pcib1: secondary bus 1
>>> pcib1: subordinate bus 2
>>> pcib1: no prefetched decode
>>> pcib1: Subtractively decoded bridge.
>>> pci1: <PCI bus> on pcib1
>>> pci1: domain=0, physical bus=1
>>> pcib2: <PCI-PCI bridge> at device 25.0 on pci0
>>> pcib2: domain 0
>>> pcib2: secondary bus 2
>>> pcib2: subordinate bus 3
>>> pcib2: no prefetched decode
>>> pcib2: Subtractively decoded bridge.
>>> pci2: <PCI bus> on pcib2
>>> pci2: domain=0, physical bus=2
> This is indeed the problem. PCI bus 2 is "claimed" by both pcib1 and pcib2
> since the VM author programmed the bridges incorrectly. In this case, the
> subordinate bus should be "1" and "2", not "2" and "3". You could add a hack
> to pci_pci.c to fix the subordinate bus on these bridges which should probably
> fix this.
I guess a quirk should be added to pci_pci.c:572? I guess it would
be enough to check the chipid and then set the secbus and subbus
according to the supbus, am I right? That quirk should be also added to
But this would be a temporary hack, fortunately this hardware can be
fixed (because it's virtual); so I guess the VBox team should be
notified about this one.
Prou top-posting : http://ca.wikipedia.org/wiki/Top-posting
Stop top-posting : http://en.wikipedia.org/wiki/Posting_style
O O O Gustau Pérez i Querol
O O O Departament d'Enginyeria Telemàtica
O O O Universitat Politècnica de Catalunya
Edifici C3 - Despatx S101-B
UPC Campus Nord UPC
C/ Jordi Girona, 1-3
08034 - Barcelona
More information about the freebsd-stable