[systemd-devel] Second (erroneous) check of rootfs?

[Chris Murphy]

On Sun, Jan 11, 2015 at 4:11 AM, Andrei Borzenkov <arvidjaar at gmail.com> wrote:
> В Sun, 11 Jan 2015 13:43:34 +0300
> Nikolai Zhubr <n-a-zhubr at yandex.ru> пишет:
>
>> >
>> > Uh. Why not simply mount rootfs rw in initrd then?
>>
>> I'm not against generally. But it'd mean that this first mount is
>> actually a real mount, the fs will start up in full. Then I'd suppose it
>> is definitely a must to supply all necessary mount options (from fstab)
>> at this stage already. I don't easily see how to do this currently, at
>> least on my opensuse system.
>>
>
> By adding all needed options to rootflags="..." (modify
> GRUB_CMDLINE_LINUX_DEFAULT and possibly GRUB_CMDLINE_LINUX_RECOVERY
> in /etc/default/grub; you can use yast for it).
>
> Otherwise it is functional gap between non-systemd and systemd
> enabled dracut. Without systemd dracut will actually mount root
> read-only, then fetch mount options from real root /etc/fstab and then
> remount real root read-write using correct options. This all got lost
> when converting to systemd.


Not true on Fedora even still with 21. The kernel parameter ro is
present, so dracut mounts root read-only, then reads fstab, then does
a remount. Fedora is a systemd OS of course.


-- 
Chris Murphy