Re: ceph rbd crashes/stalls while random write 4k blocks

[Stefan Priebe - Profihost AG <s.priebe@profihost.ag>]

Am 25.05.2012 09:33, schrieb Florian Haas:
> On Fri, May 25, 2012 at 8:47 AM, Stefan Priebe - Profihost AG
> <s.priebe@profihost.ag> wrote:
>> Am 24.05.2012 16:19, schrieb Florian Haas:
>>> On Thu, May 24, 2012 at 4:09 PM, Stefan Priebe - Profihost AG
>>> <s.priebe@profihost.ag> wrote:
>>>>> Take a look at these to see if anything looks familiar:
>>>>>
>>>>> http://oss.sgi.com/bugzilla/show_bug.cgi?id=922
>>>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/979498
>>>>> http://oss.sgi.com/archives/xfs/2011-11/msg00400.html
>>>>
>>>> These are solved by using 3.0.20.
>>>
>>> ... or so Christoph says, but comment #4 in bug 922 seems to indicate otherwise.
>>
>> I'm sorry you're absolutely right. BUT XFS had some regressions with
>> xlog_grabt_log_space since 2.6.28 which was fixed in 3.0.X by reverting
>> back to a kernel thread instead of workers. I was working with Christoph
>> and Dave on this problem and it tooked be nearly a whole month to track
>> that down (git commit c7eead1e118fb7e34ee8f5063c3c090c054c3820). In this
>> case (#922) it seems it is really related to a too small log. But I
>> don't have a too small log in my ceph case ;-)
> 
> Hmmm. So what's Chinner saying about this one? Should we move this
> discussion to an XFS list?

I already send the trace to Christoph, Dave and the XFS List. Sadly no
reply.

Stefan