On 20/08/2013 08:44, Helmut Jarausch wrote: > On 08/19/2013 04:55:29 PM, Mike Gilbert wrote: >> On Mon, Aug 19, 2013 at 5:58 AM, Helmut Jarausch >> <jarau...@igpm.rwth-aachen.de> wrote: >> > Hi, >> > >> > what binaries and libraries have to be put into an initramfs for a >> system >> > booting with init=/usr/lib/systemd/systemd ? >> > (I am building the initramsfs myself) >> > >> >> You need to get your root filesystem and /usr mounted. Just keep that >> goal in mind and start adding files to support it. >> >> There doesn't need to be anything systemd-specific. >> > > I am not sure about "timing". > > Initially the kernel has only the "mini" /usr partition contained within > the initramfs. > Then it switches to "real root" and only then it tries to mount the > "real" /usr partition. > Does this all happen before the kernel hands control over to the init > process (i.e. systemd) ?
Yes. init requires / to be properly mounted. You have a typo in your description, it should be: "Then it switches to "real root" and mounts the "real" / partition." The kernel mounts /, init mounts /usr (read from fstab). The kernel does not mount /usr (although there can be one in the initramfs, this is discarded when real root is mounted) -- -- Alan McKinnon alan.mckin...@gmail.com
