nginx 0.8.22 *) Feature: the "proxy_bind", "fastcgi_bind", and "memcached_bind" directives. *) Feature: the "access" and the "deny" directives support IPv6. *) Feature: the "set_real_ip_from" directive supports IPv6 addresses in request headers. *) Feature: the "unix:" parameter of the "set_real_ip_from" directive. *) Bugfix: nginx did not delete unix domain socket after configuration testing. *) Bugfix: nginx deleted unix domain socket while online upgrade. *) Bugfix: the "!-x" operator did not work. Thanks to Maxim Dounin. *) Bugfix: a segmentation fault might occur in a worker process, if limit_rate was used in HTTPS server. Thanks to Maxim Dounin. *) Bugfix: a segmentation fault might occur in a worker process while $limit_rate logging. Thanks to Maxim Dounin. *) Bugfix: a segmentation fault might occur in a worker process, if there was no "listen" directive in "server" block; the bug had appeared in 0.8.21.

--- a/auto/os/linux
+++ b/auto/os/linux
@@ -35,6 +35,12 @@ then
 fi
 
 
+# posix_fadvise64() had been implemented in 2.5.60
+
+if [ $version -lt 132412 ]; then
+    have=NGX_HAVE_POSIX_FADVISE . auto/nohave
+fi
+
 # epoll, EPOLLET version
 
 ngx_feature="epoll"