upstart plans for F10+

[Kostas Georgiou]

On Thu, May 22, 2008 at 06:13:23PM -0400, Colin Walters wrote:

> On Thu, May 22, 2008 at 4:44 PM, Bill Nottingham <notting at redhat.com> wrote:
> >
> > I mean, right now we have a static init script that runs once
> > on boot to mount NFS, SMB, etc, and set up network block devices.
> > It's also (in F9) kicked when NM brings up a new default route.
> >
> > What would be sane is to have it just mount things when it can
> > reach the proper network, and lazily unmount them when that
> > network goes away.
> 
> The issue with this is that at least last time I checked, at least
> some file systems like NFS basically don't handle the network going
> away from underneath them; if you have any userspace processes
> accessing them they'll be wedged unrecoverably in D state.  I gave up
> long ago on using kernel-based network filesystems on my laptop for
> this reason.
> 
> Simo says CIFS handles this, so maybe other filesystems could be fixed.
> 
> But anyways, mounting after the network is available (triggered by NM)
> makes sense probably.

This is a bit dangerours...

Have a look at /etc/init.d/netfs and tell me what will happen if you have
an fs marked _netdev and the fsck fails if netfs doesn't run at init but
under NM at some random point.

In my opinion you only use netfs for filesystems that you want available
at boot and n general you also want them to be always available, processes
freezing until the network is available is not a problem but a feature.
For everything else that isn't needed at boot there is always autofs.

Starting netfs at some random point after the boot or stopping it isn't a
very good idea really, not everyone is running in a laptop.

Kostas