On Tue, Jan 17, 2023 at 7:07 AM Michal Hocko <mhocko@xxxxxxxx> wrote: > > On Mon 09-01-23 12:53:07, Suren Baghdasaryan wrote: > > diff --git a/kernel/fork.c b/kernel/fork.c > > index 5986817f393c..c026d75108b3 100644 > > --- a/kernel/fork.c > > +++ b/kernel/fork.c > > @@ -474,6 +474,7 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig) > > */ > > *new = data_race(*orig); > > INIT_LIST_HEAD(&new->anon_vma_chain); > > + vma_init_lock(new); > > dup_anon_vma_name(orig, new); > > } > > return new; > > @@ -1145,6 +1146,9 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p, > > seqcount_init(&mm->write_protect_seq); > > mmap_init_lock(mm); > > INIT_LIST_HEAD(&mm->mmlist); > > +#ifdef CONFIG_PER_VMA_LOCK > > + WRITE_ONCE(mm->mm_lock_seq, 0); > > +#endif > > The mm shouldn't be visible so why WRITE_ONCE? True. Will change to a simple assignment. > > -- > Michal Hocko > SUSE Labs
