Re: Test generic/299 stalling forever

Theodore Ts'o
2016-10-13T02:16:32Z

On Wed, Oct 12, 2016 at 03:19:25PM -0600, Jens Axboe wrote:
>
> FWIW, this is the commit that fixes it:
>
> commit 39d13e67ef1f4b327c68431f8daf033a03920117
> Author: Jens Axboe <axboe@fb.com>
> Date: Fri Aug 26 14:39:30 2016 -0600
>
> backend: check if we need to update rusage stats, if stat_mutex is busy
>
> 2.14 and newer should not have the problem, but earlier versions may
> depending on how old...

Unfortunately, I'm still seeing hangs in generic/299 with the latest version of fio:

fio fio-2.14-10-g0a301e9 (Fri, 23 Sep 2016 11:57:00 -0600)

If I use an older fio, it reliably does not hang. What can I do to
help debug this?

As I said, I can attach to the hanging fio using a gdb and give you
stackdumps for all of the threads if that would be helpful.

- Ted