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Date: Wed, 28 Oct 2020 14:34:33 +0100 From: Björn Töpel <bjorn.topel@...il.com> To: netdev@...r.kernel.org, bpf@...r.kernel.org Cc: Björn Töpel <bjorn.topel@...el.com>, magnus.karlsson@...el.com, ast@...nel.org, daniel@...earbox.net, maciej.fijalkowski@...el.com, sridhar.samudrala@...el.com, jesse.brandeburg@...el.com, qi.z.zhang@...el.com, kuba@...nel.org, edumazet@...gle.com, intel-wired-lan@...ts.osuosl.org, jonathan.lemon@...il.com Subject: [RFC PATCH bpf-next 5/9] xsk: add busy-poll support for {recv,send}msg() From: Björn Töpel <bjorn.topel@...el.com> Wire-up XDP socket busy-poll support for recvmsg() and sendmsg(). Signed-off-by: Björn Töpel <bjorn.topel@...el.com> --- net/xdp/xsk.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 2e5b9f27c7a3..da649b4f377c 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -23,6 +23,7 @@ #include <linux/netdevice.h> #include <linux/rculist.h> #include <net/xdp_sock_drv.h> +#include <net/busy_poll.h> #include <net/xdp.h> #include "xsk_queue.h" @@ -472,6 +473,9 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len) if (unlikely(need_wait)) return -EOPNOTSUPP; + if (sk_can_busy_loop(sk)) + sk_busy_loop(sk, 1); /* only support non-blocking sockets */ + pool = xs->pool; if (pool->cached_need_wakeup & XDP_WAKEUP_TX) return __xsk_sendmsg(sk); @@ -493,6 +497,9 @@ static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int fl if (unlikely(need_wait)) return -EOPNOTSUPP; + if (sk_can_busy_loop(sk)) + sk_busy_loop(sk, 1); /* only support non-blocking sockets */ + if (xs->pool->cached_need_wakeup & XDP_WAKEUP_RX && xs->zc) return xsk_wakeup(xs, XDP_WAKEUP_RX); return 0; -- 2.27.0
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