Test generic/299 stalling forever

Theodore Ts'o
2015-06-18T15:53:39Z

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.

- Ted