On 09/02/21 09:14, Christoph Hellwig wrote:
On Mon, Feb 08, 2021 at 07:18:56PM +0100, Paolo Bonzini wrote:
Fair enough. I would expect that pretty much everyone using follow_pfn will
at least want to switch to this one (as it's less bad and not impossible to
use correctly), but I'll squash this in:
Daniel looked into them, so he may correct me, but the other follow_pfn
users and their destiny are:
- SGX, which is not modular and I think I just saw a patch to kill them
- v4l videobuf and frame vector: I think those are going away
entirely as they implement a rather broken pre-dmabuf P2P scheme
- vfio: should use MMU notifiers eventually
Yes, I'm thinking mostly of vfio, which could use follow_pte as a
short-term fix for just the missing permission check.
There's also s390 PCI, which is also not modular.
Paolo
Daniel, what happened to your follow_pfn series?
