btrfs kernel bug while balancing

btrfs kernel bug while balancing

[Christopher Krooß]

Hi, I just encountered this kernel bug when I executed "btrfs balance start /". I'm sorry if this is not enough data but I couldn't save the log as my system didn't respond after the dmesg. It said "kernel bug" before the trace.

partial log: http://i.imgur.com/ygk3Nid.jpg

Regards,
Chris
-- 
Christopher Krooß <c.krooss@gmail.com>

Re: btrfs kernel bug while balancing

[Chris Murphy]

On Oct 3, 2013, at 12:34 PM, Christopher Krooß <c.krooss@gmail.com> wrote:

> Hi, I just encountered this kernel bug when I executed "btrfs balance start /". I'm sorry if this is not enough data but I couldn't save the log as my system didn't respond after the dmesg. It said "kernel bug" before the trace.
> 
> partial log: http://i.imgur.com/ygk3Nid.jpg

If it's kernel 3.11.0 through 3.11.4 it may be a known problem. I don't know if it adversely affects the file system. I'd either look at 3.12.0-rc3, or regress to 3.10.14 if you need to balance sooner than later. Or wait until several balance related fixes end up in 3.11.x (maybe 3.11.5).

If you aren't using a 3.11 kernel, it might be useful to know what version you are using.

Chris Murphy

Re: btrfs kernel bug while balancing

[Christopher Krooß]

On Do, 2013-10-03 at 12:50 -0600, Chris Murphy wrote:
> On Oct 3, 2013, at 12:34 PM, Christopher Krooß <c.krooss@gmail.com> wrote:
> 
> > Hi, I just encountered this kernel bug when I executed "btrfs balance start /". I'm sorry if this is not enough data but I couldn't save the log as my system didn't respond after the dmesg. It said "kernel bug" before the trace.
> > 
> > partial log: http://i.imgur.com/ygk3Nid.jpg
> 
> If it's kernel 3.11.0 through 3.11.4 it may be a known problem. I don't know if it adversely affects the file system. I'd either look at 3.12.0-rc3, or regress to 3.10.14 if you need to balance sooner than later. Or wait until several balance related fixes end up in 3.11.x (maybe 3.11.5).
> 
> If you aren't using a 3.11 kernel, it might be useful to know what version you are using.
> 
> Chris Murphy


Thanks for the info. I'm in fact running 3.11.3 so I'll just wait it
out. There were some csum errors after I rebooted, but it seems to just
be /var/log/journal.

Chris

Re: btrfs kernel bug while balancing

[Chris Murphy]

On Oct 3, 2013, at 12:55 PM, Christopher Krooß <c.krooss@gmail.com> wrote:

> On Do, 2013-10-03 at 12:50 -0600, Chris Murphy wrote:
>> On Oct 3, 2013, at 12:34 PM, Christopher Krooß <c.krooss@gmail.com> wrote:
>> 
>>> Hi, I just encountered this kernel bug when I executed "btrfs balance start /". I'm sorry if this is not enough data but I couldn't save the log as my system didn't respond after the dmesg. It said "kernel bug" before the trace.
>>> 
>>> partial log: http://i.imgur.com/ygk3Nid.jpg
>> 
>> If it's kernel 3.11.0 through 3.11.4 it may be a known problem. I don't know if it adversely affects the file system. I'd either look at 3.12.0-rc3, or regress to 3.10.14 if you need to balance sooner than later. Or wait until several balance related fixes end up in 3.11.x (maybe 3.11.5).
>> 
>> If you aren't using a 3.11 kernel, it might be useful to know what version you are using.
>> 
>> Chris Murphy
> 
> 
> Thanks for the info. I'm in fact running 3.11.3 so I'll just wait it
> out. There were some csum errors after I rebooted, but it seems to just
> be /var/log/journal.

Yes, avoid balance until there's a fix, and consider tossing the journals to remove the csum errors. This bug is fixed with this patch headed to stable.

http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg27549.html


Chris Murphy