Registering Mapped Linux Character Device Memory with cudaHostRegister Results in Invalid Argument

Question

I\'m trying to boost DMA<->CPU<->GPU data transfer by: 1. Mapping my (proprietary) device Linux Kernel allocated memory to user space 2. Registering the later (mapped memo

Answer 1

Made it work!

• The full answer may be found in: https://devtalk.nvidia.com/default/topic/1014391/cuda-programming-and-performance/registering-mapped-linux-character-device-memory-with-cudahostregister-results-in-invalid-argument/?offset=3#5174771
• There is a problem with memory chunks longer than 2 pages (> 8K) working with Cuda...

Thanks, Yoel.