rfc: EFI System partition, FAT32, repair and non-persistent mount

[Adam Williamson]

On Tue, 2014-03-18 at 17:27 -0700, Andrew Lutomirski wrote:
> On Tue, Mar 18, 2014 at 5:19 PM, Lennart Poettering
> <mzerqung at 0pointer.de> wrote:
> > On Tue, 18.03.14 15:07, Chris Murphy (lists at colorremedies.com) wrote:
> >
> >> > Fedora takes a different approach though, and will mount an explicit
> >> > boot partition to /boot and the ESP to /boot/efi, and do so
> >> > unconditionally without involving autofs.  Fedora could add
> >> > "x-systemd-automount" to the mount options of /boot/efi, and thus
> >> > turning /boot/efi into an autofs too.
> >>
> >> When I add x-systemd.automount to fstab for /boot/efi, it still gets
> >> mounted on every boot.
> >
> > Ah, yeah sorry, forgot to mention, you need to also add "noauto" to the
> > line. If it is "auto" we'll still wait for the mount unit to complete.
> >
> > Basically, combining x-systemd.automount + auto is just a away to speed
> > up boot by fscking in the bg while the mount point is already
> > established. After boot the file system will be mounted as if
> > x-systemd.automount hadn't been used.
> >
> > Combining x-systemd.automount + noauto however is a way to establish a
> > mount point and only lazily triggering it on access. And that's what you
> > want to use here.
> 
> It seems like 'ls /boot/efi' shouldn't be enough to trigger a mount --
> the poi nt is that /boot/efi should stay unmounted unless there's a
> genuine need to mount it.  So just plain noauto might be good enough
> here (i.e. without the automount).

Um. What? How would it then get automounted?

You need 'noauto' to tell systemd not to mount it on boot, and
'x-systemd-automount' (when did that change from
'comment=systemd.automount'?) to tell systemd to automount it on access.
-- 
Adam Williamson
Fedora QA Community Monkey
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