Re: [PATCH v2 3/9] userfaultfd/shmem: support minor fault registration for shmem

On Mon, Apr 12, 2021 at 10:17:15PM -0700, Axel Rasmussen wrote:

This patch allows shmem-backed VMAs to be registered for minor faults. Minor faults are appropriately relayed to userspace in the fault path, for VMAs with the relevant flag.

This commit doesn't hook up the UFFDIO_CONTINUE ioctl for shmem-backed minor faults, though, so userspace doesn't yet have a way to resolve such faults.

Signed-off-by: Axel Rasmussen axelrasmussen@google.com

Everything looks right to me, but it'll be great if Andrea or Hugh will have a look too.

Acked-by: Peter Xu peterx@redhat.com