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    SubjectRe: [ANNOUNCE] hotplug-ng 002 release
    On Tue, May 10, 2005 at 11:51:04PM +0200, Per Liden wrote:
    > On Mon, 9 May 2005, Greg KH wrote:
    >
    > > On Mon, May 09, 2005 at 12:52:02AM +0200, Per Liden wrote:
    > > > On Fri, 6 May 2005, Greg KH wrote:
    > > >
    > > > [...]
    > > > > Now, with the 2.6.12-rc3 kernel, and a patch for module-init-tools, the
    > > > > USB hotplug program can be written with a simple one line shell script:
    > > > > modprobe $MODALIAS
    > > >
    > > > Nice, but why not just convert all this to a call to
    > > > request_module($MODALIAS)? Seems to me like the natural thing to do.
    > >
    > > Because that's not the only thing that the hotplug event causes to
    > > happen. It's easier to have userspace decide what to do with this
    > > instead.
    >
    > Sure, the hotplug event could still be issued so that userspace could do
    > magic things when it wants to (load firmware or whatever), but since the
    > kernel already has all the infrastructure in place to load modules on
    > demand, and it's used all over the place, it doesn't make sense to use a
    > completely different approach here.

    Well, do you really want your kernel to be creating 2 userspace programs
    for every device in sysfs that is created? Remember, we can't just not
    emit that hotplug event, too many programs need it....

    > Also, since most people never need to do anything except modprobe, they
    > can still have a working system without any scripts what so ever... again
    > just like normal on demand module loading.

    Lots of programs do lots of stuff other than modprobe on hotplug events.
    Look at HAL for just one example.

    thanks,

    greg k-h
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