Messages in this thread | | | Date | Mon, 9 Nov 2020 16:19:44 -0400 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v5 05/15] mm/frame-vector: Use FOLL_LONGTERM |
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On Mon, Nov 09, 2020 at 09:44:02AM +0100, Thomas Hellström wrote: > static inline bool vma_is_special_huge(const struct vm_area_struct > *vma) > { > return vma_is_dax(vma) || (vma->vm_file && > (vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP))); > }
That is testing a VMA, not a PTE, which doesn't help protect get_user_pages_fast.
Sounds like is has opened a big user crashy problem in DRM and the huge page stuff needs to be revereted..
Dan?
Jason
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