From: "Theo de Raadt" Subject: Re: reduce redundant load_mbuf code To: Mark Kettenis Cc: Jan Klemkow , tech@openbsd.org Date: Tue, 12 Aug 2025 13:24:06 -0600 > P.S. I wonder who cargo-culted BUS_DMA_STREAMING into these drivers. > Only the sparc64 does anything with that flag. And to be honest > even I don't really know what that is about. I think in the original architectures this requested a slightly different style of bus transaction (which was typically longer, not just descriptors being updated). I think it was nothing more than a hint. I wonder if it even mattered, back in those days, for the way OpenBSD actually used the hardware. It's probably a option in all the hardware, which only matters in the really big iron case, which we never ran on..