Re: [PATCH v5 05/15] mm/frame-vector: Use FOLL_LONGTERM
From: Jason Gunthorpe <jgg@ziepe.ca>
Date: 2020-11-09 20:19:49
Also in:
dri-devel, kvm, linux-media, linux-mm, linux-samsung-soc, lkml
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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel