diff -NurpP --minimal linux-3.0-vs2.3.1-pre8/include/linux/vserver/base.h linux-3.0-vs2.3.1-pre9/include/linux/vserver/base.h
--- linux-3.0-vs2.3.1-pre8/include/linux/vserver/base.h	2011-06-13 14:09:44.000000000 +0200
+++ linux-3.0-vs2.3.1-pre9/include/linux/vserver/base.h	2011-08-01 18:26:07.000000000 +0200
@@ -161,6 +161,11 @@ enum {
 	!((f) & ~vx_current_umask())))
 
 
+#define __vx_wmask(v)		((v)->vx_wmask)
+
+#define vx_current_wmask()	__vx_wmask(current_vx_info())
+
+
 #define __vx_state(v)	((v) ? ((v)->vx_state) : 0)
 
 #define vx_info_state(v, m)	(__vx_state(v) & (m))
diff -NurpP --minimal linux-3.0-vs2.3.1-pre8/include/linux/vserver/context.h linux-3.0-vs2.3.1-pre9/include/linux/vserver/context.h
--- linux-3.0-vs2.3.1-pre8/include/linux/vserver/context.h	2011-06-10 22:11:24.000000000 +0200
+++ linux-3.0-vs2.3.1-pre9/include/linux/vserver/context.h	2011-08-01 18:23:13.000000000 +0200
@@ -119,6 +119,7 @@ struct vx_info {
 	uint64_t vx_flags;			/* context flags */
 	uint64_t vx_ccaps;			/* context caps (vserver) */
 	uint64_t vx_umask;			/* unshare mask (guest) */
+	uint64_t vx_wmask;			/* warn mask (guest) */
 	kernel_cap_t vx_bcaps;			/* bounding caps (system) */
 
 	struct task_struct *vx_reaper;		/* guest reaper process */
diff -NurpP --minimal linux-3.0-vs2.3.1-pre8/include/linux/vserver/context_cmd.h linux-3.0-vs2.3.1-pre9/include/linux/vserver/context_cmd.h
--- linux-3.0-vs2.3.1-pre8/include/linux/vserver/context_cmd.h	2011-06-10 22:11:24.000000000 +0200
+++ linux-3.0-vs2.3.1-pre9/include/linux/vserver/context_cmd.h	2011-08-01 18:25:07.000000000 +0200
@@ -128,6 +128,23 @@ extern int vc_set_umask(struct vx_info *
 #endif	/* __KERNEL__ */
 
 
+/* wmask commands */
+
+#define VCMD_get_wmask		VC_CMD(FLAGS, 15, 0)
+#define VCMD_set_wmask		VC_CMD(FLAGS, 16, 0)
+
+struct	vcmd_wmask {
+	uint64_t wmask;
+	uint64_t mask;
+};
+
+#ifdef	__KERNEL__
+extern int vc_get_wmask(struct vx_info *, void __user *);
+extern int vc_set_wmask(struct vx_info *, void __user *);
+
+#endif	/* __KERNEL__ */
+
+
 /* OOM badness */
 
 #define VCMD_get_badness	VC_CMD(MEMCTRL, 5, 0)
diff -NurpP --minimal linux-3.0-vs2.3.1-pre8/kernel/vserver/context.c linux-3.0-vs2.3.1-pre9/kernel/vserver/context.c
--- linux-3.0-vs2.3.1-pre8/kernel/vserver/context.c	2011-07-19 19:22:49.000000000 +0200
+++ linux-3.0-vs2.3.1-pre9/kernel/vserver/context.c	2011-08-01 18:28:12.000000000 +0200
@@ -3,7 +3,7 @@
  *
  *  Virtual Server: Context Support
  *
- *  Copyright (C) 2003-2010  Herbert Pötzl
+ *  Copyright (C) 2003-2011  Herbert Pötzl
  *
  *  V0.01  context helper
  *  V0.02  vx_ctx_kill syscall command
@@ -23,6 +23,7 @@
  *  V0.16  have __create claim() the vxi
  *  V0.17  removed older and legacy stuff
  *  V0.18  added user credentials
+ *  V0.19  added warn mask
  *
  */
 
@@ -118,6 +119,7 @@ static struct vx_info *__alloc_vx_info(x
 	new->vx_bcaps = CAP_FULL_SET;	// maybe ~CAP_SETPCAP
 	new->vx_ccaps = 0;
 	new->vx_umask = 0;
+	new->vx_wmask = 0;
 
 	new->reboot_cmd = 0;
 	new->exit_code = 0;
@@ -1052,6 +1054,31 @@ int vc_set_umask(struct vx_info *vxi, vo
 }
 
 
+int vc_get_wmask(struct vx_info *vxi, void __user *data)
+{
+	struct vcmd_wmask vc_data;
+
+	vc_data.wmask = vxi->vx_wmask;
+	vc_data.mask = ~0ULL;
+
+	if (copy_to_user(data, &vc_data, sizeof(vc_data)))
+		return -EFAULT;
+	return 0;
+}
+
+int vc_set_wmask(struct vx_info *vxi, void __user *data)
+{
+	struct vcmd_wmask vc_data;
+
+	if (copy_from_user(&vc_data, data, sizeof(vc_data)))
+		return -EFAULT;
+
+	vxi->vx_wmask = vs_mask_flags(vxi->vx_wmask,
+		vc_data.wmask, vc_data.mask);
+	return 0;
+}
+
+
 int vc_get_badness(struct vx_info *vxi, void __user *data)
 {
 	struct vcmd_badness_v0 vc_data;
diff -NurpP --minimal linux-3.0-vs2.3.1-pre8/kernel/vserver/switch.c linux-3.0-vs2.3.1-pre9/kernel/vserver/switch.c
--- linux-3.0-vs2.3.1-pre8/kernel/vserver/switch.c	2011-07-20 02:40:51.000000000 +0200
+++ linux-3.0-vs2.3.1-pre9/kernel/vserver/switch.c	2011-08-01 18:28:26.000000000 +0200
@@ -3,7 +3,7 @@
  *
  *  Virtual Server: Syscall Switch
  *
- *  Copyright (C) 2003-2007  Herbert Pötzl
+ *  Copyright (C) 2003-2011  Herbert Pötzl
  *
  *  V0.01  syscall switch
  *  V0.02  added signal to context
@@ -16,6 +16,7 @@
  *  V0.09  added tag commands
  *  V0.10  added oom bias
  *  V0.11  added device commands
+ *  V0.12  added warn mask
  *
  */
 
@@ -115,6 +116,11 @@ long do_vcmd(uint32_t cmd, uint32_t id,
 	case VCMD_get_umask:
 		return vc_get_umask(vxi, data);
 
+	case VCMD_set_wmask:
+		return vc_set_wmask(vxi, data);
+
+	case VCMD_get_wmask:
+		return vc_get_wmask(vxi, data);
 #ifdef	CONFIG_IA32_EMULATION
 	case VCMD_get_rlimit:
 		return __COMPAT(vc_get_rlimit, vxi, data, compat);
@@ -332,6 +338,7 @@ long do_vserver(uint32_t cmd, uint32_t i
 	__VCMD(get_ccaps,	 3, VCA_VXI,	VCF_INFO);
 	__VCMD(get_cflags,	 3, VCA_VXI,	VCF_INFO);
 	__VCMD(get_umask,	 3, VCA_VXI,	VCF_INFO);
+	__VCMD(get_wmask,	 3, VCA_VXI,	VCF_INFO);
 	__VCMD(get_badness,	 3, VCA_VXI,	VCF_INFO);
 	__VCMD(get_vhi_name,	 3, VCA_VXI,	VCF_INFO);
 	__VCMD(get_rlimit,	 3, VCA_VXI,	VCF_INFO);
@@ -378,6 +385,7 @@ long do_vserver(uint32_t cmd, uint32_t i
 	__VCMD(set_bcaps,	 7, VCA_VXI,	VCF_ARES | VCF_SETUP);
 	__VCMD(set_cflags,	 7, VCA_VXI,	VCF_ARES | VCF_SETUP);
 	__VCMD(set_umask,	 7, VCA_VXI,	VCF_ARES | VCF_SETUP);
+	__VCMD(set_wmask,	 7, VCA_VXI,	VCF_ARES | VCF_SETUP);
 	__VCMD(set_badness,	 7, VCA_VXI,	VCF_ARES | VCF_SETUP);
 
 	__VCMD(set_vhi_name,	 7, VCA_VXI,	VCF_ARES | VCF_SETUP);