Hi Wanpeng Li, I have just noticed 11c731e81bb0 (mm/mempolicy: fix !vma in new_vma_page()) and I am not sure I understand it. Your changelog claims " page_address_in_vma() may still return -EFAULT because of many other conditions in it. As a result the while loop in new_vma_page() may end with vma=NULL. " And the patch handles hugetlb case only. I was wondering what are those "other conditions" that failed in the BUG_ON mentioned in the changelog? Could you be more specific please? Thanks! -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>