* Oleg Nesterov <o...@redhat.com> wrote:
> On 06/13, Oleg Nesterov wrote:
> >
> > Afaics, we need to ensure that:
> >
> > > + if (pgd_val(*pgd_src))
> > > + WRITE_ONCE(*pgd_dst, *pgd_src);
> >
> > either we notice the recent update of this PGD, or (say) the subsequent
> > sync_global_pgds() can miss the child.
>
> and perhaps !pgd_none(pgd_src) will look better.
Indeed - fixed.
Thanks,
Ingo
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