free the unnecessary shared memory
diff --git a/src/core/ngx_cycle.c b/src/core/ngx_cycle.c
index 84be875..9602e3e 100644
--- a/src/core/ngx_cycle.c
+++ b/src/core/ngx_cycle.c
@@ -594,6 +594,56 @@
/* close and delete stuff that lefts from an old cycle */
+ /* free the unnecessary shared memory */
+
+ opart = &old_cycle->shared_memory.part;
+ oshm_zone = opart->elts;
+
+ for (i = 0; /* void */ ; i++) {
+
+ if (i >= opart->nelts) {
+ if (opart->next == NULL) {
+ goto old_shm_zone_done;
+ }
+ opart = opart->next;
+ oshm_zone = opart->elts;
+ i = 0;
+ }
+
+ part = &cycle->shared_memory.part;
+ shm_zone = part->elts;
+
+ for (n = 0; /* void */ ; n++) {
+
+ if (n >= part->nelts) {
+ if (part->next == NULL) {
+ break;
+ }
+ part = part->next;
+ shm_zone = part->elts;
+ n = 0;
+ }
+
+ if (oshm_zone[i].name.len == shm_zone[n].name.len
+ && ngx_strncmp(oshm_zone[i].name.data,
+ shm_zone[n].name.data,
+ oshm_zone[i].name.len)
+ == 0)
+ {
+ goto live_shm_zone;
+ }
+ }
+
+ ngx_shm_free(&oshm_zone[i].shm);
+
+ live_shm_zone:
+
+ continue;
+ }
+
+old_shm_zone_done:
+
+
/* close the unnecessary listening sockets */
ls = old_cycle->listening.elts;
