On Tue, 20 Apr 2021, 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. > > Acked-by: Peter Xu <peterx@xxxxxxxxxx> > Signed-off-by: Axel Rasmussen <axelrasmussen@xxxxxxxxxx> And if this "04/10" had been numbered 03/10, I would have said Acked-by: Hugh Dickins <hughd@xxxxxxxxxx> Just read the comment above: "so userspace doesn't yet have a way to resolve such faults" - if it doesn't by this stage, we're in trouble. > --- > fs/userfaultfd.c | 6 +++--- > include/uapi/linux/userfaultfd.h | 7 ++++++- > mm/memory.c | 8 +++++--- > mm/shmem.c | 12 +++++++++++- > 4 files changed, 25 insertions(+), 8 deletions(-)
