xs_udp_write_space(9)

💅 xs_udp_write_space(9) — Kernel API Manual 💅

okay so welcome to the xs_udp_write_space(9) page, bestie — we're doing kernel socket lore today and it's lowkey iconic 🫶✨

🎀 NAME 🎀

xs_udp_write_space — callback invoked when socket buffer space becomes available 💖

✨ SYNOPSIS ✨

void xs_udp_write_space (struct sock *sk );

🌸 ARGUMENTS 🌸

• sk — socket whose state has changed 🦋

💫 DESCRIPTION 💫

Called when more output buffer space is available for this socket. Big mood: we try not to wake our writers until they can make "significant" progress, otherwise we'll waste resources thrashing kernel_sendmsg with a bunch of small requests. fr fr, nobody wants that tiny-request chaos 😭🔥

🔥 SEE ALSO 🔥

Kernel file ./net/sunrpc/xprtsock.c — and here's the whole squad, bestie:

• xs_nospace(9)
• xs_local_send_request(9)
• xs_udp_send_request(9)
• xs_tcp_send_request(9)
• xs_error_report(9)
• xs_close(9)
• xs_destroy(9)
• xs_udp_data_read_skb(9)
• xs_data_ready(9)
• xs_local_state_change(9)
• xs_tcp_state_change(9)
• xs_tcp_write_space(9)
• xs_udp_set_buffer_size(9)
• xs_udp_timer(9)
• xs_set_port(9)
• xs_local_setup_socket(9)
• xs_enable_swap(9)
• xs_disable_swap(9)
• xs_tcp_shutdown(9)
• xs_tcp_setup_socket(9)
• xs_tls_handshake_done(9)
• xs_tcp_tls_setup_socket(9)
• xs_connect(9)
• xs_local_print_stats(9)
• xs_udp_print_stats(9)
• xs_tcp_print_stats(9)
• bc_send_request(9)
• xs_setup_local(9)
• xs_setup_udp(9)
• xs_setup_tcp(9)
• xs_setup_tcp_tls(9)
• xs_setup_bc_tcp(9)
• init_socket_xprt(9)
• cleanup_socket_xprt(9)

okay that's the whole page, bestie!! source/version: ./net/sunrpc; date: October 2026. now go be the main character of socket buffer space 💅✨