Re: [PATCH v2 05/12] mm/hugetlb: unify hugetlb migration callback function

[Joonsoo Kim]

2020ë 6ì 9ì (í) ìí 10:43, Michal Hocko <mhocko@xxxxxxxxxx>ëì ìì:
>
> On Wed 27-05-20 15:44:56, Joonsoo Kim wrote:
> [...]
> > -/* page migration callback function */
> >  struct page *alloc_huge_page_nodemask(struct hstate *h,
> >                               struct alloc_control *ac)
> >  {
> >       ac->gfp_mask |= htlb_alloc_mask(h);
> > +     if (ac->nid == NUMA_NO_NODE)
> > +             ac->gfp_mask &= ~__GFP_THISNODE;
>
> Is this really needed? alloc_huge_page_node is currently only called
> from numa migration code and the target node should be always defined.

Thanks! When I read the code, I was not sure that the target node is always
defined so I left this code. However, if it's true, this code isn't
needed at all.
I will consider your suggestion in the next version.

Thanks.