Re: Problem adding more than 8 network adapters


Al 29/08/2012 16:16, En/na Andriy Gapon ha escrit:
> on 29/08/2012 16:54 Gustau P矇rez i Querol said the following:
>> Al 29/08/2012 15:30, En/na Andriy Gapon ha escrit:
>>> I wonder where the discrepancy could come from.
>>> Why would VirtualBox emulate the bridge differently for different OSes?
>>> And I do not see any quirks related to bus numbers for this PCI ID in either
>>> Linux, FreeBSD or lspci code...
>>>
>>> I think that output of lspci on FreeBSD could be interesting too (it's available
>>> via sysutils/pciutils port).
>>>
>>     The output of lspci gives the same info as pciconf. I'm attaching it however.
> [snip]
>> 00:18.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f2) (prog-if 01 [Subtractive decode])
>> 	Flags: bus master, 66MHz, fast devsel, latency 0
>> 	Bus: primary=01, secondary=01, subordinate=02, sec-latency=0
>> 	!!! Unknown I/O range types e0/df
>> 	!!! Unknown memory range types f100/f0ff
>>
>> 00:19.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f2) (prog-if 01 [Subtractive decode])
>> 	Flags: bus master, 66MHz, fast devsel, latency 0
>> 	Bus: primary=02, secondary=02, subordinate=03, sec-latency=0
>> 	!!! Unknown I/O range types e0/df
>> 	!!! Unknown memory range types f100/f0ff
> I think that I was wrong with regard to Linux.  I see that it does extensive
> bridge reconfiguring if it notices any insanity.  And I'd say that VirtualBix does
> create an insane config here.
> I believe that primary should be 0, secondary should be 1 and 2 respectively (as
> they are) and subordinate should be equal to secondary.  So primary bus numbers
> and subordinate bus numbers are insane here.
> I am not sure how much the incorrect bus numbers actually affect FreeBSD PCI-PCI
> driver as it does not seem to use primary and subordinate numbers for anything
> important.
>
> Memory and I/O misconfiguration are most likely much more important here.
>
> In any case, here is a link to the broken VirtualBox code:
> http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Devices/Bus/DevPciIch9.cpp
> See function ich9pciInitBridgeTopology, which sets primary bus and secondary bus
> to X and subordinate bus to X+1.
>
> And here a link to Linux code that re-configures those bus numbers:
> http://lxr.linux.no/#linux+v3.5.3/drivers/pci/probe.c#L663
>
> I bet that was "bus configuration invalid, reconfiguring" message during Linux boot.

    I did not see that message.

    Anyhow I found how to fix VBox to work as it should. I think I'm 
closing this thread and move it to @emulation.

    Gustau

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O O O Gustau P矇rez i Querol
O O O Departament d'Enginyeria Telem쎠tica
O O O Universitat Polit癡cnica de Catalunya
       Edifici C3 - Despatx S101-B
  UPC  Campus Nord UPC
       C/ Jordi Girona, 1-3
       08034 - Barcelona

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