From: Jesper Dangaard Brouer <bro...@redhat.com> Date: Mon, 23 Jan 2017 09:39:40 +0100
> BUT there are other advantages of using a guaranteed recycle pool > facility (like the page_pool). Namely, (1) DMA-overhead: keeping page > DMA mapped to counter DMA+IOMMU overhead, (2) RX-zero-copy: opens up > for a software memory model solution for pre-VMA-mapping pages to > userspace (See: [1] for argument how this avoids leaking kernel mem, > but only expose/leak packet-data mem) +1
