On Fri, Jun 22, 2018 at 05:40:47AM +0800, Yang Shi wrote: > When merging anonymous page vma, if the size of vam can fit in at least s/vam/vma/ > one hugepage, the mm will be registered for khugepaged for collapsing > THP in the future. > > But, it skips shmem vma. Doing so for shmem too when merging vma in > order to increase the odd to collapse hugepage by khugepaged. Good catch. Thanks. I think the fix incomplete. We shouldn't require vma->anon_vma for shmem, only for anonymous mappings. We don't support file-private THPs. > Also increase the count of shmem THP collapse. It looks missed before. Separate patch, please. -- Kirill A. Shutemov
