10.3 and reboot -r (reroot)

[Eugene Grosbein]

CCing Edward Tomasz Napierala, "Root Remount" project contact.

On 19.04.2016 16:42, Melissa Jenkins wrote:
> My apologies:
> 
>  [root at test:~]# sysctl -A kern.proc.pathname
>  [root at test:~]# kenv vfs.root.mountfrom
> nfs:nfsserver:/bootenv/10.3
>  [root at test:~]# kenv vfs.root.mountfrom=zfs:test/root_role
> vfs.root.mountfrom="zfs:test/root_role"
>  [root at test:~]# reboot -r
>  [root at test:~]# 
> 
> Apr 19 09:35:28 test reroot: rerooted by melissa
> Apr 19 09:35:28 test init: failed to get kern.proc.pathname: No such file or directory
> Apr 19 09:35:28 test init: reroot failed; going to single user mode
> Apr 19 09:35:28 test root: /etc/rc: WARNING: could not store hostuuid in /etc/hostid.
> Apr 19 09:35:31 test root: /etc/rc: WARNING: failed to start dev
> 
> It actually doesn't do seem to either drop to single user mode or actually kill anything off.  If you reroot to the existing directory it seems to panic though I don't have a crash file from this.
> 
> The machine has been booted from a vanilla 10.3 PXE boot.  I've then created a zfs file system on local disks, installed the operating system in it and would like to 'restart the system into' this new file system.  Normally I'd use the init_script and init_chroot kenv flags but rerooting seems cleaner and may allow chroots to work better

It seems, reroot currently does not work for PXE-booted systems.
You should fill a PR.