On Dec 23, 2012 12:46 PM, "Nuno J. Silva" <nunojsi...@ist.utl.pt> wrote: > > 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 > >> > nunojsi...@ist.utl.pt (Nuno J. Silva) wrote: > > > >> >> On 2012-12-18, Alan McKinnon wrote: > > > >> >> > On Tue, 18 Dec 2012 09:08:53 -0500 > >> >> > Michael Mol <mike...@gmail.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. > > Or is something outside udev needing stuff under /usr?
Yes. That's the pivot of the problem. > > -- > Nuno Silva (aka njsg) > http://njsg.sdf-eu.org/ > >
