[systemd-devel] experiments with 'minimal build'

Greg KH gregkh at linuxfoundation.org
Thu Mar 19 09:21:42 PDT 2015

On Fri, Mar 20, 2015 at 02:44:47AM +1100, Jeff Waugh wrote:
> On Fri, Mar 20, 2015 at 2:39 AM, Alison Chaiken <alison at she-devel.com> wrote:
>     http://freedesktop.org/wiki/Software/systemd/MinimalBuilds/ says that
>     the minimum requirements are udev and journald.   I wonder if udev is
>     really needed if the kernel is completely statically compiled and
>     module loading is disabled?   That is a common use case for many
>     embedded devices.
> Yeah, we still need udev to populate /dev and manage device changes, all of
> which is still relevant even if the kernel has everything built in. (devtmpfs
> doesn't let us dump udev, either.)

Population of /dev happens from devtmpfs, not udev.  udev doesn't create
device nodes anymore, and hasn't for years from what I recall.


greg k-h

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