From a6a4bd18f7046696e81a9e36fb93f0bd398c1bf6 Mon Sep 17 00:00:00 2001
From: Marko Kreen <markokr@gmail.com>
Date: Thu, 3 Jan 2008 21:42:55 +0000
Subject: [PATCH] looping accept() to drain backlog fully

---
 src/pooler.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/pooler.c b/src/pooler.c
index 5c6d893..e707b21 100644
--- a/src/pooler.c
+++ b/src/pooler.c
@@ -180,9 +180,14 @@ static void pool_accept(int sock, short flags, void *is_unix)
 	} addr;
 	socklen_t len = sizeof(addr);
 
+loop:
 	/* get fd */
 	fd = accept(sock, &addr.sa, &len);
 	if (fd < 0) {
+		/* no more */
+		if (errno == EWOULDBLOCK)
+			return;
+
 		/*
 		 * probably fd limit, pointless to try often
 		 * wait a bit, hope that admin resolves somehow
@@ -211,6 +216,12 @@ static void pool_accept(int sock, short flags, void *is_unix)
 		log_debug("P: new tcp client");
 		accept_client(fd, &addr.in, false);
 	}
+
+	/*
+	 * there may be several clients waiting,
+	 * avoid context switch by looping
+	 */
+	goto loop;
 }
 
 bool use_pooler_socket(int sock, bool is_unix)
-- 
2.39.5