f page faults than what was available before
> (PROT_NONE + SIGSEGV trap).
Not to spam with 23 e-mails, all patches are
Acked-by: Pavel Emelyanov
Thanks!
-- Pavel
> +static int mcopy_atomic_pte(struct mm_struct *dst_mm,
> + pmd_t *dst_pmd,
> + struct vm_area_struct *dst_vma,
> + unsigned long dst_addr,
> + unsigned long src_addr)
> +{
> + struct mem_cgroup *me
> All UFFDIO_COPY/ZEROPAGE/REMAP methods already support CRIU postcopy
> live migration and the UFFD can be passed to a manager process through
> unix domain sockets to satisfy point 5).
Yup :) That's the best (from my POV) point of ufd -- the ability to delegate
the descriptor to some other task
> diff --git a/kernel/fork.c b/kernel/fork.c
> index cf65139..cb215c0 100644
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -425,6 +425,7 @@ static int dup_mmap(struct mm_struct *mm, struct
> mm_struct *oldmm)
> goto fail_nomem_anon_vma_fork;
> tmp->vm_flags &
> +ssize_t remap_pages(struct mm_struct *dst_mm, struct mm_struct *src_mm,
> + unsigned long dst_start, unsigned long src_start,
> + unsigned long len, __u64 mode)
> +{
> + struct vm_area_struct *src_vma, *dst_vma;
> + long err = -EINVAL;
> + pmd_t *src_p
> +int handle_userfault(struct vm_area_struct *vma, unsigned long address,
> + unsigned int flags, unsigned long reason)
> +{
> + struct mm_struct *mm = vma->vm_mm;
> + struct userfaultfd_ctx *ctx;
> + struct userfaultfd_wait_queue uwq;
> +
> + BUG_ON(!rwsem_is_loc
