On Sat, 16 Apr 2022 10:35:26 +0000 Peng Liu <liupeng256@xxxxxxxxxx> wrote: > Certain systems are designed to have sparse/discontiguous nodes. In > this case, nr_online_nodes can not be used to walk through numa node. > Also, a valid node may be greater than nr_online_nodes. > > However, in hugetlb, it is assumed that nodes are contiguous. Recheck > all the places that use nr_online_nodes, and repair them one by one. oops. What are the user-visible runtime effects of this flaw?