Hi!
I figured out that you cant use CUDA ressources like dev pointers or host memory allocated by cudaHostAlloc() by an other thread than the one which created them (for doing so you need to use portable, mapped memory as I know).
Sadly I couldnt find any explanation why this is inside the documentation. It would be nice if someone could point me to a part of the doc I may have overlooked or if maybe a NVIDIA employee could give me an official explanation (this could make a difference in some projects, you know, so it would be nice to have something official to bolster your explorations).
Thx alot!