Merging r4077, r4101, r4102: open_file_cache related fixes: *) Bugfix: open_file_cache lost is_directio flag. On file retest open_file_cache lost is_directio if file wasn't changed. This caused unaligned operations under Linux to fail with EINVAL. It wasn't noticeable with AIO though, as errors wasn't properly logged. *) Bugfix: open_file_cache did not update file info on retest. If file inode was not changed, cached file information was not updated on retest. As a result stale information might be cached forever if file attributes was changed and/or file was extended.

--- a/src/os/unix/ngx_file_aio_read.c
+++ b/src/os/unix/ngx_file_aio_read.c
@@ -86,6 +86,9 @@ ngx_file_aio_read(ngx_file_t *file, u_ch
             return aio->nbytes;
         }
 
+        ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
+                      "aio read \"%s\" failed", file->name.data);
+
         return NGX_ERROR;
     }