On 12/13/22 17:27, Nico Pache wrote: > According to the document linked the following approach is even faster > than the one I used due to CPU parallelization: I do not think we are very concerned with speed here. This routine is being called in the creation of compound pages, and in the case of hugetlb the tear down of gigantic pages. In general, creation and tear down of gigantic pages happens infrequently. Usually only at system/application startup and system/application shutdown. I think the only case where we 'might' be concerned with speed is in the creation of compound pages for THP. Do note that this code path is still using set_compound_order as it has not been converted to folios. -- Mike Kravetz
