+#define MDS_LOV_BUFSIZE max_t(int, MDS_LOV_MAXREQSIZE + 1024, \
+ 128 * 1024)
+
+/**
+ * MDS_OUT_BUFSIZE = max_out_reqsize + max sptlrpc payload (~1K) which is
+ * about 10K, for the same reason as MDS_LOV_BUFSIZE, we also give some
+ * extra bytes to each request buffer to improve buffer utilization rate.
+ */
+#define MDS_OUT_BUFSIZE max_t(int, MDS_OUT_MAXREQSIZE + 1024, \
+ 24 * 1024)