Tuesday, October 11, 2016 • 16:10 - 16:40

The design of the FUTEX API led to a state where the kernel knows very little where a futex may be and who may do what to it. The kernel code has a few regular cases which are handled and most of it are corner cases. On -RT we suffer a little more than the others. However the improvements made in -RT also benefit non-RT people. This talk highlights some of them, how we found them, what we did about it.

RT users and developers

Sebastian Siewior maintains the Preempt-RT patchset for several years as part of his work for Linutronix, and once he even ported -RT to m68knommu. Two years ago he presented what it means to play catch up with mainline with the -RT patchset at Linux Plumbers.