--- linux-2.6.9-np/mm/filemap.c	2004-08-29 14:03:40.989353448 +0200
+++ linux-2.6/mm/filemap.c	2004-08-29 13:48:37.000000000 +0200
@@ -798,6 +798,15 @@ page_not_up_to_date:
 		/* Did somebody else fill it already? */
 		if (PageUptodate(page)) {
 			unlock_page(page);
+			nr = PAGE_CACHE_SIZE;
+			if (index == end_index) {
+				nr = isize & ~PAGE_CACHE_MASK;
+				if (nr <= offset) {
+					page_cache_release(page);
+					goto out;
+				}
+			}
+			nr = nr - offset;
 			goto page_ok;
 		}