pipes: Rename PIPE_NONALIG_DATA to PIPE_MAX_NONALIG_SIZE

And make it dep. on PIPE_DEF_BUFFERS, this points to
a limit from kernel side.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/image.h

@@ -166,7 +166,8 @@ struct pipe_data_entry {
  * some part of pages may be loosed if data are not
  * aligned in a file.
  */
-#define PIPE_NONALIG_DATA (15 * PAGE_SIZE)
+#define PIPE_DEF_BUFFERS	16
+#define PIPE_MAX_NONALIG_SIZE	((PIPE_DEF_BUFFERS - 1) * PAGE_SIZE)
 
 #define USK_EXTERN	(1 << 0)
 

pipes.c

@@ -373,7 +373,7 @@ dump:
 		pde.bytes = has_bytes;
 		pde.off = 0;
 
-		if (has_bytes > PIPE_NONALIG_DATA) {
+		if (has_bytes > PIPE_MAX_NONALIG_SIZE) {
 			off = lseek(fd_pipes, 0, SEEK_CUR);
 			off += sizeof(pde);
 			off &= PAGE_SIZE -1;