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    SubjectRe: devfs vs udev, thoughts from a devfs user
    On Tue, Feb 10, 2004 at 12:52:51PM -0500, Chris Friesen wrote:
    > What names would you use for your device files? This is the key
    > difference. With udev it gets a notification that says "I have a new
    > block device", it then looks it up, applies the rules, and creates a new
    > entry. The whole point is to move the naming scheme into userspace for
    > easier management.

    Why does it make management easier to have no predictable name for a

    > You could have the kernel export a simple devfs with a hardcoded naming
    > scheme based on similar ideas as what is in sysfs (which would then make
    > sysfs and the daemon optional for tiny embedded setups), but the only
    > advantage over just exporting the information in sysfs is to save a few
    > bytes at the cost of yet another filesystem to maintain.

    I think the space savings are a pretty good reason alone. Add to that
    the fact I think devfs would be a good idea even if it cost MORE
    memory... You can mount a devfs on your RO root instead of needing to
    mount a tmpfs on /dev and then run udev on that. A devfs gives
    consistant names for devices in addition to the user's preferred
    user-space dictated naming scheme. A devfs means even with dynamic
    majors/minors, even if you have new hardware in your system, your /dev
    at least has the devices it needs.
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