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From: Hiren Panchasara <hiren@FreeBSD.org>
Date: Thu, 27 Feb 2014 22:34:09 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org
Subject: svn commit: r262578 - stable/10/sys/kern
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Author: hiren
Date: Thu Feb 27 22:34:09 2014
New Revision: 262578
URL: http://svnweb.freebsd.org/changeset/base/262578

Log:
  MFC r257472
  
  Rate limit (to once per minute) "Listen queue overflow" message in
  sonewconn().

Modified:
  stable/10/sys/kern/uipc_socket.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/kern/uipc_socket.c
==============================================================================
--- stable/10/sys/kern/uipc_socket.c	Thu Feb 27 21:50:46 2014	(r262577)
+++ stable/10/sys/kern/uipc_socket.c	Thu Feb 27 22:34:09 2014	(r262578)
@@ -486,6 +486,10 @@ SYSCTL_INT(_regression, OID_AUTO, sonewc
 struct socket *
 sonewconn(struct socket *head, int connstatus)
 {
+	static struct timeval lastover;
+	static struct timeval overinterval = { 60, 0 };
+	static int overcount;
+
 	struct socket *so;
 	int over;
 
@@ -497,9 +501,17 @@ sonewconn(struct socket *head, int conns
 #else
 	if (over) {
 #endif
-		log(LOG_DEBUG, "%s: pcb %p: Listen queue overflow: "
-		    "%i already in queue awaiting acceptance\n",
-		    __func__, head->so_pcb, head->so_qlen);
+		overcount++;
+
+		if (ratecheck(&lastover, &overinterval)) {
+			log(LOG_DEBUG, "%s: pcb %p: Listen queue overflow: "
+			    "%i already in queue awaiting acceptance "
+			    "(%d occurrences)\n",
+			    __func__, head->so_pcb, head->so_qlen, overcount);
+
+			overcount = 0;
+		}
+
 		return (NULL);
 	}
 	VNET_ASSERT(head->so_vnet != NULL, ("%s:%d so_vnet is NULL, head=%p",