On Mon, 18 Mar 2013 06:13:42 +0000 "Hampson, Steven T" 
<steven.t.hamp...@intel.com> wrote:

> Using mbind to change the mempolicy to MPOL_BIND on several adjacent
> mmapped blocks
> may result in a reset of the mempolicy to MPOL_DEFAULT in vma_adjust.
> 
> ...
>
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -820,7 +820,7 @@ again:                    remove_next = 1 + (end > 
> next->vm_end);
>               if (next->anon_vma)
>                       anon_vma_merge(vma, next);
>               mm->map_count--;
> -             mpol_put(vma_policy(next));
> +             vma_set_policy(vma, vma_policy(next));
>               kmem_cache_free(vm_area_cachep, next);
>               /*
>                * In mprotect's case 6 (see comments on vma_merge),

Is this missing an mpol_put(vma_policy(vma))?
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