On Wed, 16 Aug 2017 14:14:36 -0400 Waiman Long <long...@redhat.com> wrote:
> > You also just turned the mutex into a spinlock. What happens if we just > > preempted the owner of bdev->bd_mutex and are an RT task with higher > > priority? This will turn into a live lock. > > > >> + schedule(); > >> + } > >> > > That is OK because I used schedule() instead of cpu_relax() for > inserting delay. Please explain to me how that is OK? schedule is a nop if the current task is the highest priority task running, and it preempted the owner of the lock. Nothing will actually schedule. -- Steve
