bdescr * todos_last;
unsigned int n_todos; // count of above
+ bdescr * part_blocks; // partially-full scanned blocks
+ unsigned int n_part_blocks; // count of above
+
bdescr * scavenged_large_objects; // live large objs after GC (d-link)
unsigned int n_scavenged_large_blocks; // size (not count) of above