diff --git a/auto/lib/pcre/conf b/auto/lib/pcre/conf
index a907e8b..a2ab1c6 100644
--- a/auto/lib/pcre/conf
+++ b/auto/lib/pcre/conf
@@ -44,8 +44,8 @@
 
             ngx_lib_inc="#include <pcre.h>"
             ngx_lib="PCRE library"
-            ngx_lib_test="pcre *re; pcre_compile(re, 0, NULL, 0, NULL)"
-            ngx_libs=-lpcre
+            ngx_lib_test="pcre *re; re = pcre_compile(NULL, 0, NULL, 0, NULL)"
+            ngx_libs="-lpcre"
             . auto/lib/test
 
 
@@ -61,6 +61,7 @@
 
             ngx_lib="PCRE library in /usr/local/"
             ngx_lib_cflags="-I /usr/local/include"
+            ngx_libs="-L /usr/local/lib -lpcre"
             . auto/lib/test
         fi
 
diff --git a/src/core/nginx.c b/src/core/nginx.c
index 9c35e08..3e3a072 100644
--- a/src/core/nginx.c
+++ b/src/core/nginx.c
@@ -65,7 +65,6 @@
 
 
 ngx_int_t     ngx_max_module;
-ngx_atomic_t  ngx_connection_counter;
 
 ngx_int_t     ngx_process;
 ngx_pid_t     ngx_pid;
diff --git a/src/core/nginx.h b/src/core/nginx.h
index 224605a..61a6f50 100644
--- a/src/core/nginx.h
+++ b/src/core/nginx.h
@@ -12,9 +12,5 @@
 
 extern ngx_module_t        ngx_core_module;
 
-extern ngx_atomic_t        ngx_connection_counter;
-
-extern ngx_int_t           ngx_process;
-
 
 #endif /* _NGINX_H_INCLUDED_ */
diff --git a/src/core/ngx_config.h b/src/core/ngx_config.h
index eb3cacb..4e3e77b 100644
--- a/src/core/ngx_config.h
+++ b/src/core/ngx_config.h
@@ -83,6 +83,7 @@
 
 /* TODO: auto */
 #define NGX_INT32_LEN      sizeof("-2147483648") - 1
+#define NGX_INT64_LEN      sizeof("-9223372036854775808") - 1
 #define NGX_TIME_T_LEN     sizeof("-2147483648") - 1
 #define NGX_OFF_T_LEN      sizeof("-9223372036854775808") - 1
 
diff --git a/src/event/modules/ngx_epoll_module.c b/src/event/modules/ngx_epoll_module.c
index fb41fd4..1d38779 100644
--- a/src/event/modules/ngx_epoll_module.c
+++ b/src/event/modules/ngx_epoll_module.c
@@ -341,11 +341,12 @@
 int ngx_epoll_process_events(ngx_cycle_t *cycle)
 {
     int                events;
+    size_t             n;
     ngx_int_t          instance, i;
     ngx_uint_t         lock, expire;
-    size_t             n;
-    ngx_msec_t         timer;
     ngx_err_t          err;
+    ngx_log_t         *log;
+    ngx_msec_t         timer;
     struct timeval     tv;
     ngx_connection_t  *c;
     ngx_epoch_msec_t   delta;
@@ -416,6 +417,7 @@
     }
 
     lock = 1;
+    log = cycle->log;
 
     for (i = 0; i < events; i++) {
         c = event_list[i].data.ptr;
@@ -431,7 +433,11 @@
             c->write->returned_instance = instance;
         }
 
-        ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+#if (NGX_DEBUG)
+        log = c->log ? c->log : cycle->log;
+#endif
+
+        ngx_log_debug3(NGX_LOG_DEBUG_EVENT, log, 0,
                        "epoll: fd:%d ev:%04X d:" PTR_FMT,
                        c->fd, event_list[i].events, event_list[i].data);
 
@@ -442,19 +448,19 @@
              * that was just closed in this iteration
              */
 
-            ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+            ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
                            "epoll: stale event " PTR_FMT, c);
             continue;
         }
 
         if (event_list[i].events & (EPOLLERR|EPOLLHUP)) {
-            ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
+            ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0,
                            "epoll_wait() error on fd:%d ev:%04X",
                            c->fd, event_list[i].events);
         }
 
         if (event_list[i].events & ~(EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)) {
-            ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
+            ngx_log_error(NGX_LOG_ALERT, log, 0,
                           "strange epoll_wait() events fd:%d ev:%04X",
                           c->fd, event_list[i].events);
         }
diff --git a/src/event/ngx_event.c b/src/event/ngx_event.c
index c5ea45d..70a533f 100644
--- a/src/event/ngx_event.c
+++ b/src/event/ngx_event.c
@@ -48,6 +48,10 @@
 ngx_event_actions_t               ngx_event_actions;
 
 
+ngx_atomic_t                      connection_counter;
+ngx_atomic_t                     *ngx_connection_counter = &connection_counter;
+
+
 ngx_atomic_t                     *ngx_accept_mutex_ptr;
 ngx_atomic_t                     *ngx_accept_mutex;
 ngx_uint_t                        ngx_accept_mutex_held;
@@ -152,6 +156,9 @@
 static ngx_int_t ngx_event_module_init(ngx_cycle_t *cycle)
 {
 #if !(WIN32)
+
+    size_t             size;
+    char              *shared;
     ngx_core_conf_t   *ccf;
     ngx_event_conf_t  *ecf;
 
@@ -163,19 +170,26 @@
 
     ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module);
 
-    if (ecf->accept_mutex == 0) {
-        return NGX_OK;
-    }
 
-    ngx_accept_mutex_ptr = (ngx_atomic_t *) mmap(NULL, sizeof(ngx_atomic_t),
-                                                 PROT_READ|PROT_WRITE,
-                                                 MAP_ANON|MAP_SHARED, -1, 0);
+    /* TODO: 128 is cache line size */
 
-    if (ngx_accept_mutex_ptr == NULL) {
+    size = 128            /* ngx_accept_mutex */
+           + 128;         /* ngx_connection_counter */
+
+    shared = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);
+
+    if (shared == NULL) {
         ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
                       "mmap(MAP_ANON|MAP_SHARED) failed");
         return NGX_ERROR;
     }
+
+    if (ecf->accept_mutex) {
+        ngx_accept_mutex_ptr = (ngx_atomic_t *) shared;
+    }
+
+    ngx_connection_counter = (ngx_atomic_t *) (shared + 128);
+
 #endif
 
     return NGX_OK;
diff --git a/src/event/ngx_event.h b/src/event/ngx_event.h
index 433d6cf..4c1403f 100644
--- a/src/event/ngx_event.h
+++ b/src/event/ngx_event.h
@@ -407,6 +407,7 @@
 } ngx_event_module_t;
 
 
+extern ngx_atomic_t          *ngx_connection_counter;
 
 extern ngx_atomic_t          *ngx_accept_mutex_ptr;
 extern ngx_atomic_t          *ngx_accept_mutex;
diff --git a/src/event/ngx_event_accept.c b/src/event/ngx_event_accept.c
index 70db78d..235ff7f 100644
--- a/src/event/ngx_event_accept.c
+++ b/src/event/ngx_event_accept.c
@@ -270,7 +270,7 @@
          *             or protection by critical section or light mutex
          */
 
-        c->number = ngx_atomic_inc(&ngx_connection_counter);
+        c->number = ngx_atomic_inc(ngx_connection_counter);
 
         ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
                        "accept: fd:%d c:%d", s, c->number);
diff --git a/src/event/ngx_event_connect.c b/src/event/ngx_event_connect.c
index 24fa834..857b3f6 100644
--- a/src/event/ngx_event_connect.c
+++ b/src/event/ngx_event_connect.c
@@ -202,7 +202,7 @@
      *             or protection by critical section or mutex
      */
 
-    c->number = ngx_atomic_inc(&ngx_connection_counter);
+    c->number = ngx_atomic_inc(ngx_connection_counter);
 
     if (ngx_add_conn) {
         if (ngx_add_conn(c) == NGX_ERROR) {
diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
index 2410671..2797670 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -3,6 +3,8 @@
 #include <ngx_core.h>
 #include <ngx_event.h>
 
+#include <nginx.h>
+
 
 static void ngx_master_exit(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx);
 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data);
@@ -531,3 +533,54 @@
 }
 
 #endif
+
+
+static ngx_int_t ngx_create_pid_file(ngx_cycle_t *cycle, ngx_master_ctx_t *ctx)
+{
+    size_t             len;
+    u_char             pid[NGX_INT64_LEN + 1];
+    ngx_core_conf_t   *ccf;
+
+    ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
+
+    if (ccf->pid.len == 0) {
+        ccf->pid.len = sizeof(NGINX_PID) - 1;
+        ccf->pid.data = NGINX_PID;
+        ccf->newpid.len = sizeof(NGINX_NEW_PID) - 1;
+        ccf->newpid.data = NGINX_NEW_PID;
+
+    } else {
+        ccf->newpid.len = ccf->pid.len + sizeof(NGINX_NEW_PID_EXT);
+        if (!(ccf->newpid.data = ngx_alloc(ccf->newpid.len, cycle->log))) {
+            return NGX_ERROR;
+        }
+
+        ngx_memcpy(ngx_cpymem(ccf->newpid.data, ccf->pid.data, ccf->pid.len),
+                   NGINX_NEW_PID_EXT, sizeof(NGINX_NEW_PID_EXT));
+    }
+
+    len = ngx_snprintf((char *) pid, /* STUB */ 10, PID_T_FMT, ngx_getpid());
+    ngx_memzero(&ctx->pid, sizeof(ngx_file_t));
+    ctx->pid.name = ngx_inherited ? ccf->newpid : ccf->pid;
+    ctx->name = ccf->pid.data;
+
+    ctx->pid.fd = ngx_open_file(ctx->pid.name.data, NGX_FILE_RDWR,
+                                NGX_FILE_CREATE_OR_OPEN);
+
+    if (ctx->pid.fd == NGX_INVALID_FILE) {
+        ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
+                      ngx_open_file_n " \"%s\" failed", ctx->pid.name.data);
+        return NGX_ERROR;
+    }
+
+    if (ngx_write_file(&ctx->pid, pid, len, 0) == NGX_ERROR) {
+        return NGX_ERROR;
+    }
+
+    if (ngx_close_file(ctx->pid.fd) == NGX_FILE_ERROR) {
+        ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
+                      ngx_close_file_n " \"%s\" failed", ctx->pid.name.data);
+    }
+
+    return NGX_OK;
+}