--- linux-2.6.20.orig/arch/i386/Kconfig.debug 
+++ linux-2.6.20/arch/i386/Kconfig.debug 
@@ -59,6 +59,7 @@
 config 4KSTACKS
 	bool "Use 4Kb for kernel stacks instead of 8Kb"
 	depends on DEBUG_KERNEL
+	default y
 	help
 	  If you say Y here the kernel will use a 4Kb stacksize for the
 	  kernel stack attached to each process/thread. This facilitates