On Wed, Apr 28, 2010 at 09:03:02AM +0900, KAMEZAWA Hiroyuki wrote: > I bet calling __get_user_pages_fast() before vma_adjust() is the way to go. > When page_count(page) != page_mapcount(page) +1, migration skip it. My proposed fix avoids to walk the pagetables once more time and to mangle over the page counts. Can you check it? It works but it needs more review. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>