reiser4 WARNING: discard atom failed (-95)

reiser4 WARNING: discard atom failed (-95)

[Gleb Baryshev]

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

Re: reiser4 WARNING: discard atom failed (-95)

[Edward Shishkin]

Hi Gleb,

It means that your sdb1 doesn't support TRIM command.
sdb1 is virtual device, correct?

Edward.


On 09/18/2015 04:38 PM, Gleb Baryshev wrote:
> 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

Re: reiser4 WARNING: discard atom failed (-95)

[Gleb Baryshev]

On 18.09.2015 17:15, Edward Shishkin wrote:
> Hi Gleb,
>
> It means that your sdb1 doesn't support TRIM command.
> sdb1 is virtual device, correct?
>
> Edward.
>

Ok, thanks for clarification. Yes, it is VirtualBox VDI disk image.

It turned out that VirtualBox GUI only allows to switch "--nonrotational 
on", so after issuing "VBoxManage --discard on" in addition I got rid of 
this warning.

Best regards,
Gleb