Re: [PATCH bpf-next 1/2] bpf, sockmap: Fix udp_bpf_recvmsg() spinning on backlog-only ingress
flat view
From: Alexei Starovoitov <hidden>
Date: 2026-09-30 09:02:01
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bpf, lkml
On Tue, Sep 29, 2026 at 04:34 PM chenyuan_fl@163.com [off-list ref] wrote:
quoted hunk ↗ jump to hunk
@@ -91,7 +91,7 @@ static int udp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); data = udp_msg_wait_data(sk, psock, timeo); if (data) { - if (psock_has_data(psock)) + if (!sk_psock_queue_empty(psock)) goto msg_bytes_ready; release_sock(sk);
sashiko is right. This replaces a spin with a hang. pw-bot: cr