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    SubjectRe: [ANNOUNCE] udev 0.1 release
    Date
    On Friday 11 April 2003 23:57, Greg KH wrote:

    > No, you want to make sure you have the same "name" after that. As any
    > userspace apps that had a open file on the original disks are basically
    > screwed anyway, we want a way to enable them to recover nicely.
    >
    > And no, I don't want to go into the whole, remove a device and plug it
    > back in, and userspace never noticed the difference while it held an
    > open file handle. That's a problem I don't want to even go near right
    > now, and is totally different from what udev is trying to do :)

    Ok, but that still leaves the race between creation and removal of devices
    files. In my scenario three different bad things can happen:

    - The file is removed after the device is added
    - The file is added when the device is already unplugged again
    - The file gets added with the wrong device number -> worst case

    This can be avoided by completely serializing all events, both inside
    the kernel and the execution of /sbin/hotplug, but that might cause
    significant downtime.

    Arnd <><
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