--- 2.6.22.10.clean/drivers/md/Kconfig	2007-10-10 10:50:35.000000000 -0700
+++ 2.6.22.10/drivers/md/Kconfig	2007-11-21 13:02:54.000000000 -0800
@@ -271,6 +271,14 @@ config DM_DELAY
 
 	If unsure, say N.
 
+config DM_DDSNAP
+	tristate "Distributed Data Snapshot target (EXPERIMENTAL)"
+	depends on BLK_DEV_DM && EXPERIMENTAL
+	---help---
+	  This device-mapper target allows you to take multiple simultaneous
+	  read/write snapshots of a clustered or non-clustered block devices.
+	  If unsure, say N.
+
 endmenu
 
 endif
--- 2.6.22.10.clean/drivers/md/Makefile	2007-10-10 10:50:35.000000000 -0700
+++ 2.6.22.10/drivers/md/Makefile	2007-11-21 13:02:27.000000000 -0800
@@ -37,6 +37,7 @@ obj-$(CONFIG_DM_MULTIPATH_EMC)	+= dm-emc
 obj-$(CONFIG_DM_SNAPSHOT)	+= dm-snapshot.o
 obj-$(CONFIG_DM_MIRROR)		+= dm-mirror.o
 obj-$(CONFIG_DM_ZERO)		+= dm-zero.o
+obj-$(CONFIG_DM_DDSNAP)		+= dm-ddsnap.o
 
 quiet_cmd_unroll = UNROLL  $@
       cmd_unroll = $(PERL) $(srctree)/$(src)/unroll.pl $(UNROLL) \
--- 2.6.22.10.clean/include/linux/prctl.h	2007-10-10 10:50:35.000000000 -0700
+++ 2.6.22.10/include/linux/prctl.h	2007-11-21 10:46:25.000000000 -0800
@@ -59,4 +59,8 @@
 # define PR_ENDIAN_LITTLE	1	/* True little endian mode */
 # define PR_ENDIAN_PPC_LITTLE	2	/* "PowerPC" pseudo little endian */
 
+/* set process less throttleL: see PF_LESS_THROTTLE */
+#define PR_SET_LESS_THROTTLE           21
+#define PR_SET_MEMALLOC			22
+
 #endif /* _LINUX_PRCTL_H */
--- 2.6.22.10.clean/kernel/sys.c	2007-10-10 10:50:35.000000000 -0700
+++ 2.6.22.10/kernel/sys.c	2007-11-21 10:46:25.000000000 -0800
@@ -2241,7 +2241,16 @@ asmlinkage long sys_prctl(int option, un
 		case PR_SET_ENDIAN:
 			error = SET_ENDIAN(current, arg2);
 			break;
-
+		case PR_SET_LESS_THROTTLE: {
+			current->flags |= PF_LESS_THROTTLE;
+			return 0;
+		}
+			
+		case PR_SET_MEMALLOC: {
+			current->flags |= PF_MEMALLOC;
+			printk("set PF_MEMALLOC for process %s[%i]\n", current->comm, current->pid);
+			return 0;
+		}
 		default:
 			error = -EINVAL;
 			break;
--- 2.6.22.10.clean/net/socket.c	2007-10-10 10:50:35.000000000 -0700
+++ 2.6.22.10/net/socket.c	2007-11-21 10:46:25.000000000 -0800
@@ -2316,6 +2316,12 @@ int kernel_sock_ioctl(struct socket *soc
 	return err;
 }
 
+/* Cluster devices need these, or better: kernel interfaces */
+
+EXPORT_SYMBOL_GPL(sys_connect);
+EXPORT_SYMBOL_GPL(sys_recvmsg);
+EXPORT_SYMBOL_GPL(sys_socket);
+
 /* ABI emulation layers need these two */
 EXPORT_SYMBOL(move_addr_to_kernel);
 EXPORT_SYMBOL(move_addr_to_user);