Re: [PATCH v2] blktrace: Fix potentail deadlock between delete & sysfs ops

[Steven Rostedt]

On Thu, 17 Aug 2017 17:10:07 -0400
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:


> Instead of playing games with taking the lock, the only way this race
> is hit, is if the partition is being deleted and the sysfs attribute is
> being read at the same time, correct? In that case, just return
> -ENODEV, and be done with it.

Nevermind that wont work. Too bad there's not a mutex_lock_timeout()
that we could use in a loop. It would solve the issue of forward
progress with RT tasks, and will break after a timeout in case of
deadlock.

-- Steve