On Tue, Oct 11, 2022 at 09:48:08PM +0200, Michael Grzeschik wrote: > I also have an patch in the queue that will limit the sg support for > devices with speed > HIGH_SPEED. Because of the overhead of the limited > transfer payload of 1024*3 Bytes, it is possible that a simple memcpy > will actually be fast enough. But for that patch I still have to make > proper measurements. Btw. which USB speed are you transferring with? For a payload that small, yes a memcpy is almost always faster. I think it's only much larger sizes that actually start to help with sg. Can you submit this change now? Odds are it will help out a lot of systems. thanks, greg k-h
