diff --git a/kernel/param.h b/kernel/param.h
index 80ec6d3..07e6f17 100644
--- a/kernel/param.h
+++ b/kernel/param.h
@@ -1,4 +1,8 @@
-#define NPROC        64  // maximum number of processes
+#ifdef LAB_FS
+#define NPROC        10  // maximum number of processes
+#else
+#define NPROC        64  // maximum number of processes (speedsup bigfile)
+#endif
 #define NCPU          8  // maximum number of CPUs
 #define NOFILE       16  // open files per process
 #define NFILE       100  // open files per system
@@ -9,7 +13,21 @@
 #define MAXOPBLOCKS  10  // max # of blocks any FS op writes
 #define LOGSIZE      (MAXOPBLOCKS*3)  // max data blocks in on-disk log
 #define NBUF         (MAXOPBLOCKS*3)  // size of disk block cache
-#define FSSIZE       2000  // size of file system in blocks
+#ifdef LAB_FS
+#define FSSIZE       200000  // size of file system in blocks
+#else
+#ifdef LAB_LOCK
+#define FSSIZE       10000  // size of file system in blocks
+#else
+#define FSSIZE       2000   // size of file system in blocks
+#endif
+#endif
 #define MAXPATH      128   // maximum file path name
-#define USERSTACK    1     // user stack pages
+
+#ifdef LAB_UTIL
+#define USERSTACK    2     // user stack pages
+#else
+#define USERSTACK    1     // user stack pages
+#endif
+