From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrei Borzenkov <arvidjaar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [systemd-devel] Second (erroneous) check of rootfs?
Date: Sun, 11 Jan 2015 14:57:58 +0300
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To: Chris Murphy <lists-zXQU9YWDTqjmlV4oE/1sFAC/G2K4zDHf@public.gmane.org>
Cc: Nikolai Zhubr <n-a-zhubr-o+MxOtu4lMCHXe+LvDLADg@public.gmane.org>, initramfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, systemd-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org

=D0=92 Sun, 11 Jan 2015 04:15:41 -0700
Chris Murphy <lists-zXQU9YWDTqjmlV4oE/1sFAC/G2K4zDHf@public.gmane.org> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:

> On Sun, Jan 11, 2015 at 4:11 AM, Andrei Borzenkov <arvidjaar-Re5JQEeQqe8@public.gmane.org=
m> wrote:
> > =D0=92 Sun, 11 Jan 2015 13:43:34 +0300
> > Nikolai Zhubr <n-a-zhubr-o+MxOtu4lMCHXe+LvDLADg@public.gmane.org> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:
> >
> >> >
> >> > 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 supp=
ose it
> >> is definitely a must to supply all necessary mount options (from f=
stab)
> >> 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=3D"..." (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 t=
hen
> > remount real root read-write using correct options. This all got lo=
st
> > when converting to systemd.
>=20
>=20
> 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.
>=20
>=20

Does it using systemd *inside* of initrd? From upstream dracut:

    if ! dracut_module_included "systemd"; then
        inst_hook cmdline 95 "$moddir/parse-block.sh"
        inst_hook pre-udev 30 "$moddir/block-genrules.sh"
        inst_hook mount 99 "$moddir/mount-root.sh"
                                    ^^^^^^^^^^^^^ here it does it
    fi

Do you have Fedora specific patches to do it differently?