Am 16.04.2015 um 14:15 schrieb Olaf Hering:
> On Thu, Apr 16, Tom Gundersen wrote:
>
>> to a shutdown PID 1 process and finally a transition back to
>> the initial ramdisk so that we can unmount the root file system even.
>
> Is that wishful thinking or actually implemented somewhere?
This is done on any system, which uses dracut and systemd for a long time now.
As SUSE switched to dracut recently, it should be the same as on RHEL-7/Fedora
now.
If /run/initramfs/shutdown exists and is executable,
/usr/lib/systemd/systemd-shutdown switches root to /run/initramfs/ and executes
shutdown.
The shutdown script umounts the old real root (after umounting
/oldroot/{proc,sys,run,dev}), then if the old real root was living on an
assembled device, like mdraid, the device is disassembled and waited for the
device to be clean.
See
http://git.kernel.org/cgit/boot/dracut/dracut.git/tree/modules.d/99shutdown/shutdown.sh
and for example for mdraid:
http://git.kernel.org/cgit/boot/dracut/dracut.git/tree/modules.d/90mdraid/md-shutdown.sh
This solved quite a lot of problems for unsynced raids.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
