if kmem_malloc() fails to allocate a cluster, call m_reclaim(). log "mb_map full" message only once a minute.
if kmem_malloc() fails to allocate a cluster, call m_reclaim(). log
"mb_map full" message only once a minute.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars