Sure!
On Aug 9, 2013 7:42 AM, "Kirill A. Shutemov" <
kirill.shutemov@linux.intel.com> wrote:

> Ning Qu wrote:
> > I just tried, and it seems working fine now without the deadlock
> anymore. I
> > can run some big internal test with about 40GB files in sysv shm. Just
> move
> > the line before the locking happens in vma_adjust, something as below,
> the
> > line number is not accurate because my patch is based on another tree
> right
> > now.
>
> Looks okay to me. Could you prepare real patch (description, etc.). I'll
> add it to my patchset.
>
> >
> > --- a/mm/mmap.c
> > +++ b/mm/mmap.c
> > @@ -581,6 +581,8 @@ again:                      remove_next = 1 + (end >
> > next->vm_end);
> >                 }
> >         }
> >
> > +       vma_adjust_trans_huge(vma, start, end, adjust_next);
> > +
> >         if (file) {
> >                 mapping = file->f_mapping;
> >                 if (!(vma->vm_flags & VM_NONLINEAR))
> > @@ -597,8 +599,6 @@ again:                      remove_next = 1 + (end >
> > next->vm_end);
> >                 }
> >         }
> >
> > -       vma_adjust_trans_huge(vma, start, end, adjust_next);
> > -
> >         anon_vma = vma->anon_vma;
> >         if (!anon_vma && adjust_next)
> >                 anon_vma = next->anon_vma;
> >
> >
> > Best wishes,
> > --
> > Ning Qu (曲宁) | Software Engineer | quning@google.com | +1-408-418-6066
>
> --
>  Kirill A. Shutemov
>