Dear Kernel hackers, As far as I understood CMA (contiguous memory allocation) memory is used for other purposes as long it isn't requested via cma_alloc() by a driver. cma_alloc then tries to free the memory by relocating it and returns the contiguous area. I have a case where cma_alloc() sometimes fails to relocate the memory which causes my driver (a GPU driver) to fail starting up (the driver is started when the system is running for a while). Is there a way to prevent the CM allocator to use the memory for any other purpose? Or should I better use another mechanism to allocate contiguous memory at boot time (is there a framework for doing so)? PS: I once had a patch which tries harder to relocate the pages (I patched cma_alloc()), but it didn't really work well, blocking the allocation for seconds. Thanks for your advice, - Johannes