On Mon, Jul 31, 2023 at 03:48:29PM +0800, Kefeng Wang wrote: > +/* > + * We cannot use leaf-only invalidation here, since we may be invalidating > + * table entries as part of collapsing hugepages or moving page tables. > + * Set the tlb_level to 0 because we can not get enough information here. > + */ > +#define flush_tlb_range(vma, start, end) \ > + __flush_tlb_range(vma, start, end, \ > + ((vma)->vm_flags & VM_HUGETLB) \ > + ? huge_page_size(hstate_vma(vma)) \ > + : PAGE_SIZE, false, 0) This won't work if we use the contiguous PTE to get 64K hugetlb pages on a 4K base page configuration. The 16 base pages in the range would have to be invalidated individually (the contig PTE bit is just a hint, the hardware may or may not take it into account). -- Catalin
