On Wed, Nov 30, 2022 at 06:36:56PM -0600, Bob Pearson wrote: > I'm not looking at my patch you responded to but the one you posted to replace maps > by xarrays. I see, I botched that part > The existing rxe driver assumes that if ibmr->type == IB_MR_TYPE_DMA > that the iova is just a kernel (virtual) address that is already > mapped. No, it is not correct > Maybe this is not correct but it has always worked this way. These > are heavily used by storage stacks (e.g. Lustre) which always use > DMA mr's. Since we don't actually do any DMAs we don't need to setup > the iommu for these and just do memcpy's without dealing with pages. You still should be doing the kmap Jason
