- Changed listen.backlog in the FPM configuration file to default to 128

instead of -1 (except on FreeBSD and OpenBSD). This is the same value 
  as the one used in the cgi sapi. This patch completes revision 302725.

NEWS

@@ -67,8 +67,6 @@
   opcode operands into a separate literal table. (Dmitry)
 - Changed session.entropy_file to default to /dev/urandom or /dev/arandom if
   either is present at compile time. (Rasmus)
-- Changed listen.backlog in the FPM configuration file to default to 128
-  instead of -1 (fat)
 
 - Improved CLI Interactive readline shell (Johannes)
   . Added cli.pager ini setting to set a pager for output.

sapi/fpm/fpm/fpm_conf.c

@@ -322,7 +322,7 @@ static void *fpm_worker_pool_config_alloc() /* {{{ */
 	}
 
 	memset(wp->config, 0, sizeof(struct fpm_worker_pool_config_s));
-	wp->config->listen_backlog = 128;
+	wp->config->listen_backlog = FPM_BACKLOG_DEFAULT;
 
 	if (!fpm_worker_all_pools) {
 		fpm_worker_all_pools = wp;

sapi/fpm/fpm/fpm_sockets.h

@@ -10,6 +10,15 @@
 
 #include "fpm_worker_pool.h"
 
+/*
+  On FreeBSD and OpenBSD, backlog negative values are truncated to SOMAXCONN
+*/
+#if (__FreeBSD__) || (__OpenBSD__)
+#define FPM_BACKLOG_DEFAULT -1
+#else
+#define FPM_BACKLOG_DEFAULT 128
+#endif
+
 enum fpm_address_domain fpm_sockets_domain_from_address(char *addr);
 int fpm_sockets_init_main();
 

sapi/fpm/php-fpm.conf.in

@@ -75,7 +75,7 @@
 listen = 127.0.0.1:9000
 
 ; Set listen(2) backlog.
-; Default Value: 128
+; Default Value: 128 (-1 on FreeBSD and OpenBSD)
 ;listen.backlog = 128
  
 ; List of ipv4 addresses of FastCGI clients which are allowed to connect.