diff -urN linux-2.6.17.3-vs2.1.1-rc25.orig/fs/ioprio.c linux-2.6.17.3-vs2.1.1-rc25/fs/ioprio.c
--- linux-2.6.17.3-vs2.1.1-rc25.orig/fs/ioprio.c	2006-07-13 12:48:56.000000000 +0930
+++ linux-2.6.17.3-vs2.1.1-rc25/fs/ioprio.c	2006-07-13 12:49:15.000000000 +0930
@@ -60,6 +60,8 @@
 				return -EPERM;
 			/* fall through, rt has prio field too */
 		case IOPRIO_CLASS_BE:
+			if (vx_flags(VXF_IGNEG_IONICE, 0))
+				return 0;
 			if (data >= IOPRIO_BE_NR || data < 0)
 				return -EINVAL;
 
diff -urN linux-2.6.17.3-vs2.1.1-rc25.orig/include/linux/vserver/context.h linux-2.6.17.3-vs2.1.1-rc25/include/linux/vserver/context.h
--- linux-2.6.17.3-vs2.1.1-rc25.orig/include/linux/vserver/context.h	2006-07-13 12:47:39.000000000 +0930
+++ linux-2.6.17.3-vs2.1.1-rc25/include/linux/vserver/context.h	2006-07-13 11:57:21.000000000 +0930
@@ -52,6 +52,8 @@
 
 #define VXF_IGNEG_NICE		(1ULL<<52)
 
+#define VXF_IGNEG_IONICE	(1ULL<<53)
+
 #define VXF_ONE_TIME		(0x0003ULL<<32)
 
 #define VXF_INIT_SET		(VXF_STATE_SETUP|VXF_STATE_INIT)