On Mon, Mar 23, 2020 at 10:14:57PM -0300, Jason Gunthorpe wrote: > From: Jason Gunthorpe <jgg@xxxxxxxxxxxx> > > The pagewalker does not call most ops with NULL vma, those are all routed > to pte_hole instead. Does ->pte_hole > > Thus hmm_vma_fault() is only called with a NULL vma from > hmm_vma_walk_hole(), so hoist the check to there. > > Now it is clear that snapshotting with no vma is a HMM_PFN_ERROR as > without a vma we have no path to call hmm_vma_fault(). > > Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx> Looks good, Reviewed-by: Christoph Hellwig <hch@xxxxxx>
