This is a fascinating patch. The open source community came around and fixed a bug in a binary driver. I would love to know the story of how this was found and how it was derived.
Nvidia allows only 2 concurrent accelerated video encoding sessions for consumer-grade GPUs like GeForce. It appears this limitation is enforced programmatically in Nvidia drivers. This patch is known to remove such limitation for x86_64 Linux binary drivers, allowing 60+ parallel video encoding sessions restricted only by practical hardware limits.