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    SubjectRe: [PATCH 0/5][RFC] Physical PCI slot objects
    On Mon, Nov 12, 2007 at 05:08:53PM -0700, Alex Chiang wrote:
    > Hello,
    > [this patch series touches a few subsystems; hopefully I got all
    > the right maintainers]
    > Recently, Matthew Wilcox sent out the following mail about PCI
    > slots:
    > The following patch series is a rough first cut at implementing
    > the ideas he outlined, namely, that PCI slots are physical
    > objects that we care about, independent of their hotplug
    > capabilities.

    I'm still not sold on this idea at all. I'm really betting that there
    is a lot of incorrect acpi slot information floating around in machines
    and odd things will show up in these slot entries.

    I say this because for a long time there was no "standard" acpi entries
    for hotplug slots and different companies did different things. Hence
    the "odd" IBM acpi hotplug implementation as one example. If this is
    going to go anywhere, you need to get IBM to agree that it works
    properly with all their machines...

    Also, some companies already provide userspace tools to get all of this
    information about the different slots in a system and what is where,
    from userspace, no kernel changes are needed. So, why add all this
    extra complexity to the kernel if it is not needed?


    greg k-h
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