Re: Test generic/299 stalling forever

Eric Whitney
2015-06-18T16:25:36Z

* Theodore Ts'o <tytso@mit.edu>:
> I've been trying to figure out why generic/299 has occasionally been
> stalling forever. After taking a closer look, it appears the problem
> is that the fio process is stalling in userspace. Looking at the ps
> listing, the fio process hasn't run in over six hours, and using
> attaching strace to the fio process, it's stalled in a FUTUEX_WAIT.
>
> Has anyone else seen this? I'm using fio 2.2.6, and I have a feeling
> that I started seeing this when I started using a newer version of
> fio. So I'm going to try roll back to an older version of fio and see
> if that causes the problem to go away.
>

I've not seen that, but have only been running 4.1-rc* kernels recently. I
can say that I ran 1000 trials of generic/299 on nojournal using a vanilla
4.1-rc6 kernel on a Pandaboard successfully with fio 2.2.6. No failures, and
completed in ~61 hours for an average test duration of ~3.7 minutes, which
agrees well with what I see when sampling the logged output for individual
test times.

Eric