Re: 3.15-rc6 - btrfs-transacti:4157 blocked for more than 120 seconds.

[Torbjørn <lists@skagestad.org>]

On 01. juni 2014 23:29, Marc MERLIN wrote:
> On Wed, May 28, 2014 at 04:56:56PM +0200, Torbjørn wrote:
>> On 05/28/2014 03:41 PM, Chris Mason wrote:
>>> On 05/28/2014 01:53 AM, Torbjørn wrote:
>>>
>>>> It's actually a raid10 array of 11 dm-crypt devices.
>>>> I'm able to read data from the array (accessing files), and also read
>>>> directly from all the underlying dm-crypt devices using dd, if that's
>>>> what you meant.
>>>>
>>>> I have not rebooted the system since that dmesg, so it's still stuck in
>>>> the same state.
>>>> I can keep it like that for some days. The system is not critical at all.
>>>>
>>> Thanks,
>>>
>>> Can you please capture the result of sysrq-t and sysrq-l?  Maybe the IO
>>> is stuck in a thread that isn't in the D state.
>>>
>>> -chris
>> The output of sysrq-t was too much data for pastebin, will send both
>> to you as attachments outside of the list.
> Considering I have experienced this with with 3.15rc but wasn't able to
> save a sysrq since my save file and syslog got lost, did you find out
> anything from that?
>
> Thanks,
> Marc
Hi Marc,

I have not done any real investigation of those yet, so no.

The server is mainly for testing, so I had already netconsole set up for it.
Btrfs only blocked on the one array though. Root is btrfs raid1 with 2 
devices, and it was operating as normal.

If it's of any interest, I can make the captured logs available for 
download.

--
Torbjørn