New kernel, new problems...

[L A Walsh <cifs-gT3AUAsYRbTYtjvyW6yDsg@public.gmane.org>]

Brought up 4.10.1 w/options to help cifs info-dumping
(with CONFIG_CIFS_DEBUG, CONFIG_CIFS_DEBUG2, CONFIG_DYNAMIC_DEBUG enabled.)

I probably should have tried the old options 1st, but added a
vers=2.1 to my mount line in /etc/fstab:

//Athenae/C/    /athenae    cifs    
user,noauto,rw,uid=law,gid=Administrators,nocase,serverino,vers=2.1,credentials=/home/law/.ssh/athenae,setuids,noauto 
0 0

which resulted in a mount line:

//Athenae/C/ on /athenae type cifs 
(rw,nosuid,nodev,noexec,relatime,vers=2.1,sec=ntlmssp,cache=strict,username=law,\
domain=BLISS,uid=5013,forceuid,gid=544,forcegid,addr=192.168.3.12,file_mode=0755,\
dir_mode=0755,nocase,nounix,setuids,mapposix,rsize=1048576,wsize=1048576,\
echo_interval=60,actimeo=1,user)


Haven't seen the looping yet, but got some odd messages when I mounted in
my syslog:

Mar  3 22:12:06 Ishtar kernel: [21527.100384] FS-Cache: Loaded
Mar  3 22:12:06 Ishtar kernel: [21527.120908] FS-Cache: Netfs 'cifs' 
registered for caching
Mar  3 22:12:06 Ishtar kernel: [21527.121049] Key type cifs.idmap registered
Mar  3 22:12:06 Ishtar smbd[43429]: [2017/03/03 22:12:06,  0, 
class=rpc_srv]
Mar  3 22:12:06 Ishtar smbd[43429]:   pipe_schannel_auth_bind: Attempt 
to bind using schannel without successful serverauth2
Mar  3 22:12:06 Ishtar smbd[43429]: [2017/03/03 22:12:06,  0, 
class=rpc_srv]
Mar  3 22:12:06 Ishtar smbd[43429]:   _netr_ServerAuthenticate3: 
netlogon_creds_server_check failed. Rejecting auth request from client 
ATHENAE machine account ATHENAE$
Mar  3 22:12:13 Ishtar kernel: [21533.978843] CIFS VFS: Autodisabling 
the use of server inode numbers on \\Athenae\C. This server doesn't seem 
to support them properly. Hardlinks will not be recognized on this 
mount. Consider mounting with the "noserverino" option to silence this 
message.

----
Have never seen issues w/the hardlinks -- what does it mean that "this 
server"
(windows 7SP1 doesn't support them?)

Anyway, I wanted to try other options, but now I can't unmount what I just
mounted:

# umount /athenae
This utility only unmounts cifs filesystems.

??

It **used** to unmount things when I didn't specify vers=2.1...

So how do I unmount this short of rebooting?

Thanks,
-linda