On Thu, May 11, 2023 at 09:44:55PM +0800, Ruihan Li wrote: > Christoph's patch perfectly fixes _one_ problem: kmalloc'ed memory > cannot be mapped to user space. However, as I detailed in the commit > message, this series of patches fixes _three_ problems. FYI, I agree with you. My simple patch was sent before reading your new series, and is a strict subset of it. > I have to say that the original code is quite buggy. In the > gen_pool_dma_alloc path, there is no guarantee of page alignment. I also find this whole interface very problematic to start with, but that's a separate discussion for later.