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SubjectRe: [PATCH 16/16 v6] PCI: document the new PCI boot parameters
Greg KH wrote:
> On Fri, Nov 07, 2008 at 04:17:02PM +0800, Zhao, Yu wrote:
>>> Well, to do it "correctly" you are going to have to tell the driver to
>>> shut itself down, and reinitialize itself.
>>> Turns out, that doesn't really work for disk and network devices without
>>> dropping the connection (well, network devices should be fine probably).
>>> So you just can't do this, sorry. That's why the BIOS handles all of
>>> these issues in a PCI hotplug system.
>>> How does the hardware people think we are going to handle this in the
>>> OS? It's not something that any operating system can do, is it part of
>>> the IOV PCI spec somewhere?
>> No, it's not part of the PCI IOV spec.
>>
>> I just want the IOV (and whole PCI subsystem) have more flexibility on
>> various BIOSes. So can we reconsider about resource rebalance as boot
>> option, or should we forget about this idea?
>
> As you have proposed it, the boot option will not work at all, so I
> think we need to forget about it. Especially if it is not really
> needed.

I guess at least one thing would work if people don't want to boot
twice: give the bus number 0 as rebalance starting point, then all
system resources would be reshuffled :-)

Thanks,
Yu


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