--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1569,13 +1569,7 @@ static void ngx_http_set_keepalive(ngx_h
 
         if (b != c->buffer) {
 
-            /*
-             * If the large header buffers were allocated while the previous
-             * request processing then we do not use c->buffer for
-             * the pipelined request (see ngx_http_init_request()).
-             * 
-             * Now we would move the large header buffers to the free list.
-             */
+            /* move the large header buffers to the free list */
 
             cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
 
@@ -1627,15 +1621,6 @@ static void ngx_http_set_keepalive(ngx_h
 
     hc->pipeline = 0;
 
-
-    /*
-     * To keep a memory footprint as small as possible for an idle
-     * keepalive connection we try to free the ngx_http_request_t and
-     * c->buffer's memory if they were allocated outside the c->pool.
-     * The large header buffers are always allocated outside the c->pool and
-     * are freed too.
-     */
-
     if (ngx_pfree(c->pool, r) == NGX_OK) {
         hc->request = NULL;
     }
@@ -1643,12 +1628,6 @@ static void ngx_http_set_keepalive(ngx_h
     b = c->buffer;
 
     if (ngx_pfree(c->pool, b->start) == NGX_OK) {
-
-        /*
-         * the special note for ngx_http_keepalive_handler() that
-         * c->buffer's memory was freed
-         */
-
         b->pos = NULL;
 
     } else {
@@ -1711,7 +1690,7 @@ static void ngx_http_set_keepalive(ngx_h
     }
 
 #if 0
-    /* if ngx_http_request_t was freed then we need some other place */
+    /* if "keepalive_buffers off" then we need some other place */
     r->http_state = NGX_HTTP_KEEPALIVE_STATE;
 #endif
 
@@ -1760,13 +1739,6 @@ static void ngx_http_keepalive_handler(n
     size = b->end - b->start;
 
     if (b->pos == NULL) {
-
-        /*
-         * The c->buffer's memory was freed by ngx_http_set_keepalive().
-         * However, the c->buffer->start and c->buffer->end were not changed
-         * to keep the buffer size.
-         */
-
         if (!(b->pos = ngx_palloc(c->pool, size))) {
             ngx_http_close_connection(c);
             return;