On Sat, Aug 21, 2021 at 02:04:11AM +0800, Tianyu Lan wrote: > After dma_map_sg(), we still need to go through scatter list again to > populate payload->rrange.pfn_array. We may just go through the scatter list > just once if dma_map_sg() accepts a callback and run it during go > through scatter list. Iterating a cache hot array is way faster than doing lots of indirect calls.
