On Tue, Dec 17, 2024 at 4:38 PM David Wei <dw@xxxxxxxxxxx> wrote: > > Add io_zcrx_area that represents a region of userspace memory that is > used for zero copy. During ifq registration, userspace passes in the > uaddr and len of userspace memory, which is then pinned by the kernel. > Each net_iov is mapped to one of these pages. > > The freelist is a spinlock protected list that keeps track of all the > net_iovs/pages that aren't used. > FWIW we devmem uses genpool to manage the freelist and that lets us do allocations/free without locks. Not saying you should migrate to that but it's an option you have available. -- Thanks, Mina
