Hello,

i updated our server from kernel 4.7.4 to 4.13.11 .
We have two connected btrfs devcies:
a) a connected hardware raid5 in the machine (/dev/sdb1) 
b) a IBM Storewize v3700 connected via iSCSI
(/dev/mapper/36005076300808b95c800000000000003-part1)

After restarting the server, the samba services run instable. And in dmesg
Oops messages showed up. (See attachment)
So I downgraded to 4.7.4 again, and the system is running stable again. 

If you can tell me what you need for a good bug report please tell me . I
also could give you a better / complete dmesg output. 
But I used the wrong parameters and the dmesg log was cleared. 

The server is under full use on weekdays. So i could only do tests and new
dmesg etc. on weekends.  

Please let me know if some one has a hint what could be the problem, or what
you need for a full bug report. 

Best regards 
Benedikt



Server data:

btrfs-progs v4.5.3+20160729

Label: 'Data'  uuid: 528c479a-7209-4f64-b862-482475d03a17
        Total devices 1 FS bytes used 2.07TiB
        devid    1 size 10.00TiB used 9.56TiB path /dev/sdb1

Label: 'AuwiOrdner'  uuid: 163cceda-5765-483c-9a48-c183acedac5d
        Total devices 1 FS bytes used 10.26TiB
        devid    1 size 14.00TiB used 10.37TiB path
/dev/mapper/36005076300808b95c800000000000003-part1

/dev/sdb1:
Data, single: total=9.35TiB, used=2.06TiB
System, DUP: total=8.00MiB, used=1.14MiB
System, single: total=4.00MiB, used=0.00B
Metadata, DUP: total=107.88GiB, used=7.51GiB
Metadata, single: total=8.00MiB, used=0.00B
GlobalReserve, single: total=512.00MiB, used=0.00B

/dev/mapper/36005076300808b95c800000000000003-part1:
Data, single: total=10.23TiB, used=10.22TiB
System, DUP: total=8.00MiB, used=1.11MiB
System, single: total=4.00MiB, used=0.00B
Metadata, DUP: total=75.00GiB, used=42.57GiB
Metadata, single: total=8.00MiB, used=0.00B
GlobalReserve, single: total=512.00MiB, used=0.00B