1 files changed, 26 insertions, 0 deletions

diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 2590e91b3289..75b58f81d53d 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -260,6 +260,32 @@ config NET_SCH_INGRESS
           To compile this code as a module, choose M here: the
           module will be called sch_ingress.
 
+config NET_SCH_PLUG
+        tristate "Plug network traffic until release (PLUG)"
+        ---help---
+
+          This queuing discipline allows userspace to plug/unplug a network
+          output queue, using the netlink interface.  When it receives an
+          enqueue command it inserts a plug into the outbound queue that
+          causes following packets to enqueue until a dequeue command arrives
+          over netlink, causing the plug to be removed and resuming the normal
+          packet flow.
+
+          This module also provides a generic "network output buffering"
+          functionality (aka output commit), wherein upon arrival of a dequeue
+          command, only packets up to the first plug are released for delivery.
+          The Remus HA project uses this module to enable speculative execution
+          of virtual machines by allowing the generated network output to be rolled
+          back if needed.
+
+          For more information, please refer to http://wiki.xensource.com/xenwiki/Remus
+
+          Say Y here if you are using this kernel for Xen dom0 and
+          want to protect Xen guests with Remus.
+
+          To compile this code as a module, choose M here: the
+          module will be called sch_plug.
+
 comment "Classification"
 
 config NET_CLS