From 1e1507dfb10b608bbd46c8bbab6b04118c6f3385 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Mon, 14 Dec 2015 19:26:18 -0700 Subject: [PATCH] server: bump listen() backlog With the default if 0, we trigger a lot of these: [29055.817884] TCP: request_sock_TCP: Possible SYN flooding on port 8765. Sending cookies. Check SNMP counters. Set it to 4, even 2 seems to be enough to get rid of it. Signed-off-by: Jens Axboe --- server.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/server.c b/server.c index 27ff2854..ca17f9a3 100644 --- a/server.c +++ b/server.c @@ -1889,7 +1889,7 @@ static int fio_init_server_connection(void) log_info("fio: server listening on %s\n", bind_str); - if (listen(sk, 0) < 0) { + if (listen(sk, 4) < 0) { log_err("fio: listen: %s\n", strerror(errno)); close(sk); return -1; -- 2.25.1