+ /*
+ * Only signal regular backends, since those need to notify
+ * their clients using a GoAway message.
+ */
+ if (bp->bkend_type == B_BACKEND)
This condition is slightly different to how SignalChildren works, is
that intentional? I don't think it causes any practical difference,
and I don't see an easy way to reuse SignalChildren for this, but
maybe it could still follow the same pattern.
Otherwise I don't see any other issues, and this also doesn't seem to
be an important comment.
Since the pytest framework seems unlikely to be included in PG19, have
you considered a different test implementation, to have at least some
minimal coverage?
