reiser4 WARNING: discard atom failed (-95)

[Gleb Baryshev <gleb.baryshev@gmail.com>]

Hi,

I'm trying out reiser4 discard feature (openSUSE with doiggl's package 
under VirtualBox) and getting this repeated warning. So I'd like to know 
if it is a known issue and how serious it is.


[  667.619577] Loading Reiser4 (format release: 4.0.1) See 
www.namesys.com for a description of Reiser4.
[  667.621406] reiser4: sdb1: found disk format 4.0.1.
[  667.658860] reiser4: sdb1: using Hybrid Transaction Model.
...
[  687.278657] reiser4[kcminit_startup(1503)]: 
reiser4_post_write_back_hook (../fs/reiser4/block_alloc.c:1153)[intelfx-8]:
                WARNING: discard atom failed (-95)
[  687.284161] reiser4[kcminit_startup(1503)]: 
reiser4_post_write_back_hook (../fs/reiser4/block_alloc.c:1153)[intelfx-8]:
                WARNING: discard atom failed (-95)
[  687.329700] reiser4[kcminit_startup(1503)]: 
reiser4_post_write_back_hook (../fs/reiser4/block_alloc.c:1153)[intelfx-8]:
                WARNING: discard atom failed (-95)
[  687.338194] reiser4[kcminit_startup(1503)]: 
reiser4_post_write_back_hook (../fs/reiser4/block_alloc.c:1153)[intelfx-8]:
                WARNING: discard atom failed (-95)


Linux version: 4.1.6
Format options: create=ccreg40,compress=gzip1
Mount options: noatime,onerror=remount-ro,discard


Best regards,
Gleb