Re: -mm: xfs lockdep warning

Tejun Heo
2010-10-05T16:53:51Z

On 10/05/2010 06:51 PM, Tejun Heo wrote:
> On 10/05/2010 12:09 PM, Torsten Kaiser wrote:
>> 2) the hang with 2.6.35-rc5 I have seen twice (triggered probably by
>> high load while building KOffice on an tmpfs)
>
> The trace doesn't seem to firmly point at xfs locking up. There are
> md and dm crypt involved. Are you sure this is locking up inside xfs?
> Also, can you please enable frame pointers so that we can get more
> reliable backtrace?
>
>> 3) the lockdep issue that started this thread and that I am seeing in
>> mainline 2.6.36-rc5 and -rc6 and that seems to be rather easy to
>> trigger for me.
>>
>> Because 3) is regarded as a false positive, it should not be the cause
>> of 2)
>
> For now, let's not draw any conclusion or mix the issues. I'll look
> up the original thread and look into what the lockdep warning means.

Ah, okay, David already looked into it and concluded it to be a
spurious one. Can you please attach full kernel message of the
lockup?

Thanks.

--
tejun