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    SubjectRe: What still uses the block layer?
    On Mon, 15 Oct 2007, Greg KH wrote:

    > On Mon, Oct 15, 2007 at 05:08:36AM -0500, Rob Landley wrote:
    >> On Monday 15 October 2007 4:06:20 am Julian Calaby wrote:
    >>> On 10/15/07, Rob Landley <> wrote:
    >>>> I note that the eth0 and eth1 names are dynamically assigned on a first
    >>>> come first serve basis (like scsi). This never causes me a problem
    >>>> because the driver loading order is constant, and once you figure out
    >>>> that eth0 is gigabit and eth1 is the 80211g it _stays_ that way across
    >>>> reboots, reliably. Yeah, it's a heuristic. Hands up everybody relying on
    >>>> such a heuristic in the real world.
    >>> Umm, not quite, from my experiences with pre-production wireless
    >>> drivers, (another story, another time) fancy stuff is being done in
    >>> udev to make sure that your gigabit card is always assigned to eth0.
    >> I remember building a 2.4 kernel, statically linking in all the drivers, and
    >> getting the ethernet devices showing up in a reliable order for years. Where
    >> does the need for fancy stuff come in?
    > Because PCI devices reorder their bus numbers all the time. And we have
    > ethernet devices hanging off of USB connections now (yes, even built-in
    > to the machine), and we have network connections on other hot-pluggable
    > busses (remember, PCI is hot pluggable.)

    do PCI devices reorder their bus numbers spontaniously, or only if you
    change the hardware?

    > So, the distros need to name network devices in a persistant way, that
    > is why the distros now do this. If you don't like the distro doing it,
    > complain to them, it's not a kernel issue :)

    I have, at least the response was to tell me how to kill this 'feature'
    even if they won't change it.

    David Lang

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      Last update: 2007-10-16 04:53    [W:0.022 / U:4.604 seconds]
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