On Mon, Apr 11, 2016 at 11:28 PM, Jesper Dangaard Brouer <bro...@redhat.com> wrote: > > On Mon, 11 Apr 2016 15:02:51 -0700 Alexander Duyck > <alexander.du...@gmail.com> wrote: > >> Have you taken a look at possibly trying to optimize the DMA pool API >> to work with pages? It sounds like it is supposed to do something >> similar to what you are wanting to do. > > Yes, I have looked at the mm/dmapool.c API. AFAIK this is for DMA > coherent memory (see use of dma_alloc_coherent/dma_free_coherent). > > What we are doing is "streaming" DMA memory, when processing the RX > ring. > > (NIC are only using DMA coherent memory for the descriptors, which are > allocated on driver init)
Yes, I know that but it shouldn't take much to extend the API to provide the option for a streaming DMA mapping. That was why I thought you might want to look in this direction. - Alex
