Re: mm: pages are not freed from lru_add_pvecs after process termination

[Vlastimil Babka]

On 05/02/2016 05:01 PM, Kirill A. Shutemov wrote:
> On Mon, May 02, 2016 at 04:39:35PM +0200, Vlastimil Babka wrote:
> > On 04/27/2016 07:11 PM, Dave Hansen wrote:
> > > 6. Perhaps don't use the LRU pagevecs for large pages.  It limits the
> > >     severity of the problem.
> >
> > I think that makes sense. Being large already amortizes the cost per base
> > page much more than pagevecs do (512 vs ~22 pages?).
>
> We try to do this already, don't we? Any spefic case where we have THPs on
> pagevecs?

For example like this?
__do_huge_pmd_anonymous_page
  lru_cache_add_active_or_unevictable
    lru_cache_add