Re: [PATCHv2, RFC 23/30] thp: prepare zap_huge_pmd() to uncharge file pages

["Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>]

Hillf Danton wrote:
> On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
> <kirill.shutemov@linux.intel.com> wrote:
> > From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
> >
> > Uncharge pages from correct counter.
> >
> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> > ---
> >  mm/huge_memory.c |    4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> > index a23da8b..34e0385 100644
> > --- a/mm/huge_memory.c
> > +++ b/mm/huge_memory.c
> > @@ -1368,10 +1368,12 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
> >                         spin_unlock(&tlb->mm->page_table_lock);
> >                         put_huge_zero_page();
> >                 } else {
> > +                       int counter;
> s/counter/item/ ?

I saw 'member' in other place, so I'll rename it to 'member'.

> >                         page = pmd_page(orig_pmd);
> >                         page_remove_rmap(page);
> >                         VM_BUG_ON(page_mapcount(page) < 0);
> > -                       add_mm_counter(tlb->mm, MM_ANONPAGES, -HPAGE_PMD_NR);
> > +                       counter = PageAnon(page) ? MM_ANONPAGES : MM_FILEPAGES;
> > +                       add_mm_counter(tlb->mm, counter, -HPAGE_PMD_NR);
> >                         VM_BUG_ON(!PageHead(page));
> >                         tlb->mm->nr_ptes--;
> >                         spin_unlock(&tlb->mm->page_table_lock);
> > --
> > 1.7.10.4
> >

-- 
 Kirill A. Shutemov

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