Re: [Libguestfs] [PATCH libguestfs 1/2] ocaml/implicit_close test: collect all currently unreachable blocks

... And while I'm scrawling my throughts into this thread ... What we intend here are two slightly different operations: (A) Free every unreachable object. That's what we want in this specific place in the code. (B) Provide a soft test that the OCaml heap hasn't been screwed up because of bugs in our bindings. That's what we use eg here: https://gitlab.com/nbdkit/libnbd/-/blob/master/ocaml/tests/test_100_handl... In OCaml 4 Gc.compact provides (A) and (B), in particular compaction is quite an aggressive & costly operation that requires examining and moving every object on the heap. In practice we found this quickly reveals bugs in bindings. OCaml 5 provides (A) through Gc.full_major--albeit not documented--and doesn't seem to provide any way to do (B) as far as I can tell. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v