On Tue, Dec 01, 2020 at 09:51:44AM -0800, Minchan Kim wrote: > From: Hyesoo Yu <hyesoo.yu@xxxxxxxxxxx> > > This patch supports chunk heap that allocates the buffers that > arranged into a list a fixed size chunks taken from CMA. > > The chunk heap doesn't use heap-helper although it can remove > duplicated code since heap-helper is under deprecated process.[1] > > NOTE: This patch only adds the default CMA heap to allocate chunk > pages. We will add another CMA memory regions to the dmabuf heaps > interface with a later patch (which requires a dt binding) This new heap seems to largely duplicate the exsting cma_heap.c file. Why can't you reuse the code and allow creating different heaps with different chunk sizes or max numbers of segments? > +config DMABUF_HEAPS_CHUNK_ORDER > + int "Chunk page order for dmabuf chunk heap" > + default 4 > + depends on DMABUF_HEAPS_CHUNK > + help > + Set page order of fixed chunk size to allocate from CMA. Using a config option for this is just broken. It needs to be runtime or at very least boot time / DT controllable. > + * ION Memory Allocator chunk heap exporter This comment seems wrong.
