diff -udrNp linux-2.6.32.orig/arch/x86/kernel/ioport.c linux-2.6.32/arch/x86/kernel/ioport.c
--- linux-2.6.32.orig/arch/x86/kernel/ioport.c	2009-12-02 21:51:21.000000000 -0600
+++ linux-2.6.32/arch/x86/kernel/ioport.c	2009-12-29 02:11:19.252039649 -0600
@@ -41,8 +41,15 @@ asmlinkage long sys_ioperm(unsigned long
 
 	if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
 		return -EINVAL;
-	if (turn_on && !capable(CAP_SYS_RAWIO))
-		return -EPERM;
+	if (turn_on) {
+		struct sched_param param = { .sched_priority = 0 };
+		if (!capable(CAP_SYS_RAWIO))
+			return -EPERM;
+#ifdef SCHED_ISO
+		/* Start X as SCHED_ISO */
+		sched_setscheduler_nocheck(current, SCHED_ISO, &param);
+#endif
+	}
 
 	/*
 	 * If it's the first ioperm() call in this thread's lifetime, set the
@@ -111,8 +118,13 @@ static int do_iopl(unsigned int level, s
 		return -EINVAL;
 	/* Trying to gain more privileges? */
 	if (level > old) {
+		struct sched_param param = { .sched_priority = 0 };
 		if (!capable(CAP_SYS_RAWIO))
 			return -EPERM;
+#ifdef SCHED_ISO
+		/* Start X as SCHED_ISO */
+		sched_setscheduler_nocheck(current, SCHED_ISO, &param);
+#endif
 	}
 	regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | (level << 12);