On 08/17/2017 05:30 PM, Steven Rostedt wrote: > 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 I think it will be useful to have mutex_timed_lock(). RT-mutex does have a timed version, so I guess it shouldn't be hard to implement one for mutex. I can take a shot at trying to do that. Thanks, Longman
