On 13.08.21 09:00, Jichao Zou wrote:
Pre-allocate CMA memory that configured in device tree, this greatly improves the CMA memory allocation efficiency, cma_[alloc|free] is less than 1ms, old way is took a few ms to tens or hundreds ms.
Please send patches as proper emails (man git-format-patch; man git-send-email).
What you propose is turning cma reservations into something comparable to permanent boottime allocations. From the POV of the buddy, the pages are always allocated and cannot be repurposed for e.g., movable allocations until *actually* allocated via CMA.
I don't think we want this behavior upstream. -- Thanks, David / dhildenb
