Re: Linux 4.0.0-rc5 - [ 1851.858652] BTRFS: error (device sda1) in cleanup_transaction:1686: errno=-17 Object already exists

[Chris Mason <clm@fb.com>]

On Mon, Mar 23, 2015 at 6:35 AM, Torbjørn <lists@skagestad.org> wrote:
> Hi,
> 
> After upgrading to 4.0.0-rc5 from 4.0.0-rc4 I see "Object already 
> exists" after reboot.
> The fs is forced read only.
> The error does not disappear after additional reboots.
> 
> mount|grep sda1
> /dev/sda1 on / type btrfs 
> (rw,noatime,compress=lzo,space_cache,subvol=@)
> /dev/sda1 on /home type btrfs 
> (rw,noatime,compress=lzo,space_cache,subvol=@home)
> /dev/sda1 on /mnt/volumes type btrfs 
> (rw,noatime,compress=lzo,space_cache)
> 
> Label: 'root'  uuid: 6a681300-faef-4195-a1b3-6699c7a5aa5e
>     Total devices 2 FS bytes used 66.87GiB
>     devid    1 size 298.09GiB used 124.03GiB path /dev/sda1
>     devid    2 size 298.09GiB used 124.03GiB path /dev/sdd1
> 
> btrfs-progs v3.19
> 
> Any additional info I can provide? Tests you want me to run?

Are you seeing this consistently with every boot?

If so, can you please revert this one:

commit ea526d18990018f224e5734748975bea1824545f
Author: Josef Bacik <jbacik@fb.com>
Date:   Fri Mar 13 16:40:45 2015 -0400

    Btrfs: fix ASSERT(list_empty(&cur_trans->dirty_bgs_list)

Anything special about your workload

-chris