On Thu, Feb 20, 2025 at 02:09:10AM +0000, Mina Almasry wrote: > +The user application must use MSG_ZEROCOPY flag when sending devmem TCP. Devmem > +cannot be copied by the kernel, so the semantics of the devmem TX are similar > +to the semantics of MSG_ZEROCOPY. > + > + setsockopt(socket_fd, SOL_SOCKET, SO_ZEROCOPY, &opt, sizeof(opt)); > + > +It is also recommended that the user binds the TX socket to the same interface > +the dma-buf has been bound to via SO_BINDTODEVICE. > + > + setsockopt(socket_fd, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen(ifname) + 1); > + Wrap both setsockopts above in literal code-block (just like other snippets for consistency). > +The user should create a msghdr where, > + > +iov_base is set to the offset into the dmabuf to start sending from. > +iov_len is set to the number of bytes to be sent from the dmabuf. Should above be bullet list? Thanks. -- An old man doll... just what I always wanted! - Clara
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