On Thu, Mar 21, 2024 at 06:07:54PM -0400, peterx@xxxxxxxxxx wrote: > From: Peter Xu <peterx@xxxxxxxxxx> > > Introduce per-vma begin()/end() helpers for pgtable walks. This is a > preparation work to merge hugetlb pgtable walkers with generic mm. > > The helpers need to be called before and after a pgtable walk, will start > to be needed if the pgtable walker code supports hugetlb pages. It's a > hook point for any type of VMA, but for now only hugetlb uses it to > stablize the pgtable pages from getting away (due to possible pmd > unsharing). > > Reviewed-by: Christoph Hellwig <hch@xxxxxxxxxxxxx> > Reviewed-by: Muchun Song <muchun.song@xxxxxxxxx> > Signed-off-by: Peter Xu <peterx@xxxxxxxxxx> > --- > include/linux/mm.h | 3 +++ > mm/memory.c | 12 ++++++++++++ > 2 files changed, 15 insertions(+) is_vm_hugetlb_page(vma) seems weirdly named. Regardless Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
