Re: [gentoo-user] Re: Anyone switched to eudev yet?

[Michael Mol]

On Thu, Dec 27, 2012 at 2:43 PM, Volker Armin Hemmann
<volkerarmin@××××××××××.com> wrote:
>
> Am Sonntag, 23. Dezember 2012, 19:44:43 schrieb Nuno J. Silva:
> > On 2012-12-23, Alan Mackenzie wrote:
> > > On Sun, Dec 23, 2012 at 07:03:25PM +0200, Nuno J. Silva wrote:
> > >> On 2012-12-23, Alan McKinnon wrote:
> > >> > On Sun, 23 Dec 2012 12:22:24 +0200
> > >> >
> > >> > nunojsilva@×××××××.pt (Nuno J. Silva) wrote:
> > >> >> On 2012-12-18, Alan McKinnon wrote:
> > >> >> > On Tue, 18 Dec 2012 09:08:53 -0500
> > >> >> > Michael Mol <mikemol@×××××.com> wrote:
> > >> >> >
> > >> >> > This sentence summarizes my understanding of your post nicely:
> > >> >> >> Now, why is /usr special? It's because it contains executable code
> > >> >> >> the system might require while launching.
> > >> >> >
> > >> >> > Now there are only two approaches that could solve that problem:
> > >> >> >
> > >> >> > 1. Avoid it entirely
> > >> >> > 2. Deal with it using any of a variety of bootstrap techniques
> > >> >> >
> > >> >> > #1 is handled by policy, whereby any code the system might require
> > >> >> > while launching is not in /usr.
> > >> >> >
> > >> >> > #2 already has a solution, it's called an init*. Other solutions
> > >> >> > exist but none are as elegant as a throwaway temporary filesystem
> > >> >> > in RAM.
> > >> >>
> > >> >> What about just mounting /usr as soon as the system boots?
> > >> >
> > >> > Please read the thread next time. The topic under discussion is
> > >> > solutions to the problem of not being able to do exactly that.
> > >>
> > >> Then I suppose you can surely explain in a nutshell why can't init
> > >> scripts simply do that?
> > >
> > > Because certain people with influence have rearranged the filesystem so
> > > that programs within /usr are absolutely necessary for booting; they are
> > > needed _before_ init has a chance to mount /usr.  So either /usr has to
> > > be in the root partition, or crazy kludges need to be used to mount /usr
> > > before the kernel runs init.
> >
> > I surely don't know the udev architecture well enough, but if this is
> > all done by the udev daemon, can't we just "mount /usr" before the
> > daemon is started? The only needed things should be mount (which is
> > under /bin here) and /etc/fstab.
> >
>
> and a device node in /dev - like /dev/sda2. And how do you get that one
> without udev?
>
> oops?


Yeah, the "oops" is on the part of the udev team, which decided to put
a critical piece of software there. Which is the origin of this whole
uproar for the past year or so.

--
:wq