When unmapping given VM range, we could bail out if a reference page is supplied and it is unmapped, which is a minor optimization. Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx> --- --- a/mm/hugetlb.c Wed Feb 22 19:34:12 2012 +++ b/mm/hugetlb.c Wed Feb 22 19:50:26 2012 @@ -2280,6 +2280,9 @@ void __unmap_hugepage_range(struct vm_ar if (pte_dirty(pte)) set_page_dirty(page); list_add(&page->lru, &page_list); + + if (page == ref_page) + break; } spin_unlock(&mm->page_table_lock); flush_tlb_range(vma, start, end); -- -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>