On 2017-04-01 12:50:58 [+0200], Thomas Gleixner wrote: > R/W semaphores in RT do not allow multiple readers because a writer > blocking on the sempahore would have deal with all the readers in terms of > priority or budget inheritance. While multi reader priority boosting would > be possible (it has been attempted before), multi reader budget inheritance > is impossible. … > It cures the Radeon mess, lowers the contention on mmap_sem for certain > workloads and did not have any negative impact in our initial testing on RT > behaviour. > > I think it's worth to expose it to a wider audience of users for testing, > so we can figure out it whether there are dragons lurking.
series applied. > Thanks, > > tglx Sebastian
