On Thu, Sep 13, 2018 at 08:42:30PM +0200, Peter Zijlstra wrote:
> > > +#define flush_tlb_range(vma, start, end) \
> > > + flush_tlb_mm_range((vma)->vm_mm, start, end, \
> > > + (vma)->vm_flags & VM_HUGETLB ? PMD_SHIFT :
> > > PAGE_SHIFT)
> >
> > This is safe. But, Couldn't this PMD_SHIFT also be PUD_SHIFT for a 1G
> > hugetlb page?
>
> It could be, but can we tell at that point?
I had me a look in higetlb.h, would something like so work?
#define flush_tlb_range(vma, start, end) \
flush_tlb_mm_range((vma)->vm_mm, start, end, \
huge_page_shift(hstate_vma(vma)))
