Crush on btrfs device delete missing

Crush on btrfs device delete missing

[MASAKI Yuhsuke]

btrfs device delete missing always crushes and stop system.
It log console only not STDOUT/STDERR or core file.

This is copy from leaved message on console's last screen.

=====
oops_end+0x9c/0cd0
die+0x4b/0x70
do_trap+0xb2/0x140
do_error_trap+0x89/0x110
? update_inline_extent_backref+0x2ab/0x2b0 [btrfs]
? btrfs_set_lock_blocking_rw+0x80/0c0 [btrfs]
do_invalid_op+0x20/0x30
invalid_op+0x1e/0x30
? update_inline_extent_backref+0x2ab/0x2b0 [btrfs]
? update_inline_extent_backref+0x1e8/0x2b0 [btrfs]
remove_extent_backref+0x3f/0x80 [btrfs]
__btrfs_free_extent.isra.34+0x709/0x80 [btrfs]
__btrfs_run_delayed_refs+0x567/0x1260 [btrfs]
btrfs_run_delayed_refs+0x0x9f/0x2c0 [btrfs]
delayed_ref_async_start+0x94/0xb0 [btrfs]
btrfs_scrubparity_helper+0x77/0x350
btrfs_extent_refs_helper+0xe/0x10 [btrfs]
? process_one_work+0x480/0x480
kthread+0xd8/0xf0
ret_from_fork+0x1f/0x40
? kthread_worker_fn+0x170/0x170
=====

This btrfs volume has seven disks including new blank disk and removed
missing disk, and it's mounted with degraded option.

---
MASAKI Yuhsuke <yek@reasonset.net>

Re: Crush on btrfs device delete missing

[Duncan]

MASAKI Yuhsuke posted on Sun, 28 Aug 2016 14:22:52 +0900 as excerpted:

> btrfs device delete missing always crushes and stop system.
> It log console only not STDOUT/STDERR or core file.

While I'm unlikely to be able to help with the problem, for those who 
can, you're missing some critical information, including kernel and btrfs-
progs versions (if they're old, please try a current 4.6 or 4.7 kernel if 
on current, or 4.4 if on LTS, and an appropriately matched or newer btrfs 
userspace as well), and btrfs filesystem usage or btrfs filesystem show 
and btrfs filesystem df outputs.

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman

Re: Crush on btrfs device delete missing

[MASAKI Yuhsuke]

Hi Duncan.

Sorry, I was careless.
(And sorry illrelevant To header.)

System is a Kernel 4.7.2 Manjaro Linux default setting.

===
$ uname -r
4.7.2-1-MANJARO
===

and btrfs progs.

===
$ pacman -Q btrfs-progs
btrfs-progs 4.7-1
===

result of btrfs fi usage /path/to/volume

===
Overall:
    Device size:		  19.10TiB
    Device allocated:		  10.71TiB
    Device unallocated:		   8.39TiB
    Device missing:		   2.73TiB
    Used:			  10.71TiB
    Free (estimated):		   4.19TiB	(min: 4.19TiB)
    Data ratio:			      2.00
    Metadata ratio:		      1.99
    Global reserve:		 512.00MiB	(used: 0.00B)

Data,RAID1: Size:5.34TiB, Used:5.34TiB
   /dev/dm-1	   1.78TiB
   /dev/dm-2	   1.78TiB
   /dev/dm-3	   1.78TiB
   /dev/dm-4	   1.78TiB
   /dev/dm-5	   1.78TiB
   /dev/mapper/hymaster_6	   2.00GiB
   missing	   1.78TiB

Metadata,single: Size:112.00MiB, Used:0.00B
   /dev/dm-1	  16.00MiB
   /dev/dm-2	  16.00MiB
   /dev/dm-3	  16.00MiB
   /dev/dm-4	  16.00MiB
   /dev/dm-5	  24.00MiB
   missing	  24.00MiB

Metadata,RAID1: Size:14.00GiB, Used:12.40GiB
   /dev/dm-1	   3.00GiB
   /dev/dm-2	   3.00GiB
   /dev/dm-3	   6.00GiB
   /dev/dm-4	   5.00GiB
   /dev/dm-5	   5.00GiB
   missing	   6.00GiB

System,RAID1: Size:32.00MiB, Used:784.00KiB
   /dev/dm-1	  32.00MiB
   /dev/dm-2	  32.00MiB

Unallocated:
   /dev/dm-1	 966.47GiB
   /dev/dm-2	 965.47GiB
   /dev/dm-3	 966.50GiB
   /dev/dm-4	 965.50GiB
   /dev/dm-5	 965.50GiB
   /dev/mapper/hymaster_6	   2.73TiB
   missing	 967.50GiB
===

Result of btrfs filesystem show /path/to/volume

===
Label: 'HyMasterBtr'  uuid: c78a98fb-4718-4f30-abae-466ebf6e2d8f
	Total devices 7 FS bytes used 5.36TiB
	devid    1 size 2.73TiB used 1.79TiB path /dev/mapper/hymaster_1
	devid    2 size 2.73TiB used 1.79TiB path /dev/mapper/hymaster_2
	devid    4 size 2.73TiB used 1.79TiB path /dev/mapper/hymaster_3
	devid    5 size 2.73TiB used 1.79TiB path /dev/mapper/hymaster_4
	devid    6 size 2.73TiB used 1.79TiB path /dev/mapper/hymaster_5
	devid    7 size 2.73TiB used 2.00GiB path /dev/mapper/hymaster_6
	*** Some devices missing
===

Result of btrfs filesystem df

===
Data, RAID1: total=5.34TiB, used=5.34TiB
System, RAID1: total=32.00MiB, used=784.00KiB
Metadata, RAID1: total=14.00GiB, used=12.40GiB
Metadata, single: total=112.00MiB, used=0.00B
GlobalReserve, single: total=512.00MiB, used=0.00B
===


Thank you.



On Sun, 28 Aug 2016 08:06:47 +0000 (UTC)
Duncan <1i5t5.duncan@cox.net> wrote:

> MASAKI Yuhsuke posted on Sun, 28 Aug 2016 14:22:52 +0900 as excerpted:
> 
> > btrfs device delete missing always crushes and stop system.
> > It log console only not STDOUT/STDERR or core file.  
> 
> While I'm unlikely to be able to help with the problem, for those who 
> can, you're missing some critical information, including kernel and
> btrfs- progs versions (if they're old, please try a current 4.6 or
> 4.7 kernel if on current, or 4.4 if on LTS, and an appropriately
> matched or newer btrfs userspace as well), and btrfs filesystem usage
> or btrfs filesystem show and btrfs filesystem df outputs.
>