On 3/17/20 1:43 AM, Christophe Leroy wrote: > > > Le 17/03/2020 à 09:25, Baoquan He a écrit : >> On 03/17/20 at 08:04am, Christophe Leroy wrote: >>> When CONFIG_HUGETLB_PAGE is set but not CONFIG_HUGETLBFS, the >>> following build failure is encoutered: >> >> From the definition of HUGETLB_PAGE, isn't it relying on HUGETLBFS? >> I could misunderstand the def_bool, please correct me if I am wrong. > > AFAIU, it means that HUGETLBFS rely on HUGETLB_PAGE, by default HUGETLB_PAGE is not selected when HUGETLBFS is not. But it is still possible for an arch to select HUGETLB_PAGE without selecting HUGETLBFS when it uses huge pages for other purpose than hugetlb file system. > Hi Christophe, Do you actually have a use case/example of using hugetlb pages without hugetlbfs? I can understand that there are some use cases which never use the filesystem interface. However, hugetlb support is so intertwined with hugetlbfs, I am thinking there would be issues trying to use them separately. I will look into this further. -- Mike Kravetz
