Sorry, missed a line in my patch. Here it is:
--- a/xlators/cluster/dht/src/dht-diskusage.c
+++ b/xlators/cluster/dht/src/dht-diskusage.c
@@ -53,6 +53,7 @@ dht_du_info_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
goto out;
percent = (statvfs->f_bfree * 100) / statvfs->f_blocks;
+ bytes = (statvfs->f_bfree * statvfs->f_bsize);
LOCK (&conf->subvolume_lock);
{