Merge hundin.mysql.fi:/home/marko/mysql-4.1

into hundin.mysql.fi:/home/marko/mysql-5.0-current


innobase/fil/fil0fil.c:
  SCCS merged
innobase/include/os0file.h:
  SCCS merged
innobase/os/os0file.c:
  SCCS merged

1 files changed, 11 insertions, 13 deletions

diff --git a/innobase/fil/fil0fil.c b/innobase/fil/fil0fil.c
index e236304b388..20f522c1a60 100644
--- a/innobase/fil/fil0fil.c
+++ b/innobase/fil/fil0fil.c
@@ -3410,9 +3410,9 @@ fil_extend_space_to_desired_size(
 	fil_space_t*	space;
 	byte*		buf2;
 	byte*		buf;
+	ulint		buf_size;
 	ulint		start_page_no;
 	ulint		file_start_page_no;
-	ulint		n_pages;
 	ulint		offset_high;
 	ulint		offset_low;
 	ibool		success		= TRUE;
@@ -3437,22 +3437,20 @@ fil_extend_space_to_desired_size(
 
 	fil_node_prepare_for_io(node, system, space);
 
-	/* Extend 1 MB at a time */
-
-	buf2 = mem_alloc(1024 * 1024 + UNIV_PAGE_SIZE);
-	buf = ut_align(buf2, UNIV_PAGE_SIZE);
-
-	memset(buf, '\0', 1024 * 1024);
-
 	start_page_no = space->size;
 	file_start_page_no = space->size - node->size;
 
-	while (start_page_no < size_after_extend) {	
-		n_pages = size_after_extend - start_page_no;
+	/* Extend at most 64 pages at a time */
+	buf_size = ut_min(64, size_after_extend - start_page_no)
+				* UNIV_PAGE_SIZE;
+	buf2 = mem_alloc(buf_size + UNIV_PAGE_SIZE);
+	buf = ut_align(buf2, UNIV_PAGE_SIZE);
 
-		if (n_pages > (1024 * 1024) / UNIV_PAGE_SIZE) {
-			n_pages = (1024 * 1024) / UNIV_PAGE_SIZE;
-		}
+	memset(buf, 0, buf_size);
+
+	while (start_page_no < size_after_extend) {
+		ulint	n_pages = ut_min(buf_size / UNIV_PAGE_SIZE,
+				size_after_extend - start_page_no);
 
 		offset_high = (start_page_no - file_start_page_no)
 				/ (4096 * ((1024 * 1024) / UNIV_PAGE_SIZE));