Re: [PATCH 35/46] hugetlb: add MADV_COLLAPSE for hugetlb

[James Houghton]

> +
> +               if (curr < end) {
> +                       /* Don't hold the VMA lock for too long. */
> +                       hugetlb_vma_unlock_write(vma);
> +                       cond_resched();
> +                       hugetlb_vma_lock_write(vma);

I need to drop/reacquire the mapping lock here too (missed this when I
added the bits to grab the mapping lock in this function).