Re: [PATCH v4 60/66] mm/oom_kill: Use maple tree iterators instead of vma linked list

[Liam Howlett]

* Vlastimil Babka <vbabka@xxxxxxx> [220120 07:43]:
> On 12/1/21 15:30, Liam Howlett wrote:
> > From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
> > 
> > Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
> 
> Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
> 
> Could be VMA_ITERATOR?

Indeed, I will do that.

> 
> > ---
> >  mm/oom_kill.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> > index 1ddabefcfb5a..1694b30eb46c 100644
> > --- a/mm/oom_kill.c
> > +++ b/mm/oom_kill.c
> > @@ -516,6 +516,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm)
> >  {
> >  	struct vm_area_struct *vma;
> >  	bool ret = true;
> > +	MA_STATE(mas, &mm->mm_mt, 0, 0);
> >  
> >  	/*
> >  	 * Tell all users of get_user/copy_from_user etc... that the content
> > @@ -525,7 +526,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm)
> >  	 */
> >  	set_bit(MMF_UNSTABLE, &mm->flags);
> >  
> > -	for (vma = mm->mmap ; vma; vma = vma->vm_next) {
> > +	mas_for_each(&mas, vma, ULONG_MAX) {
> >  		if (!can_madv_lru_vma(vma))
> >  			continue;
> >  
>