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Date:      Tue, 19 Apr 2016 11:39:57 +0100
From:      Melissa Jenkins <melissa-freebsd@littlebluecar.co.uk>
To:        Eugene Grosbein <eugen@grosbein.net>
Cc:        freebsd-stable@freebsd.org, Edward Tomasz Napierala <trasz@FreeBSD.org>
Subject:   Re: 10.3 and reboot -r (reroot)
Message-ID:  <629567AE-280D-481A-833C-3946612D8381@littlebluecar.co.uk>
In-Reply-To: <5716064E.3080005@grosbein.net>
References:  <mailman.13.1446379200.13179.freebsd-stable@freebsd.org> <45B67BCE-540F-432A-9AA2-192B20312D27@littlebluecar.co.uk> <5715F73F.7050208@grosbein.net> <F92A62F5-40D0-4A8A-9BEC-23EE6AA3AB62@littlebluecar.co.uk> <5716064E.3080005@grosbein.net>

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Will do - it behaves the same even without PXE.

I believe the issue is that kern.proc.pathname does not exist on any of my systems

Mel

> On 19 Apr 2016, at 11:19, Eugene Grosbein <eugen@grosbein.net> wrote:
> 
> CCing Edward Tomasz Napierala, "Root Remount" project contact.
> 
> On 19.04.2016 16:42, Melissa Jenkins wrote:
>> My apologies:
>> 
>> [root@test:~]# sysctl -A kern.proc.pathname
>> [root@test:~]# kenv vfs.root.mountfrom
>> nfs:nfsserver:/bootenv/10.3
>> [root@test:~]# kenv vfs.root.mountfrom=zfs:test/root_role
>> vfs.root.mountfrom="zfs:test/root_role"
>> [root@test:~]# reboot -r
>> [root@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.
> 



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