*) back out r2040
*) refactor ngx_palloc()
*) introduce ngx_pnalloc()
*) additional pool blocks have smaller header
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 9ec861c..27f27ae 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -2817,7 +2817,7 @@
         }
     }
 
-    p = ngx_palloc(r->pool, len);
+    p = ngx_pnalloc(r->pool, len);
     if (p == NULL) {
         return NGX_ERROR;
     }
@@ -2878,7 +2878,7 @@
 
     len = r->upstream_states->nelts * (3 + 2);
 
-    p = ngx_palloc(r->pool, len);
+    p = ngx_pnalloc(r->pool, len);
     if (p == NULL) {
         return NGX_ERROR;
     }
@@ -2944,7 +2944,7 @@
 
     len = r->upstream_states->nelts * (NGX_TIME_T_LEN + 4 + 2);
 
-    p = ngx_palloc(r->pool, len);
+    p = ngx_pnalloc(r->pool, len);
     if (p == NULL) {
         return NGX_ERROR;
     }