Linux Memory Hotplug Support
This project is to make memory
hotplug feature on Linux.
If memory is broken, it should be exchanged for new one. In
current Linux, the server must be shutdown before exchange. However,
rebooting time of huge machine is sometimes over 30 minutes. It will be
unacceptable for enterprise system. So, memory hotplug is to avoid this
Memory hotplug is also effective for Capacity On Demand(COD). In
general, it is difficult to predict necessary amount of resource
beforehand. If memory hot add is enabled, the server can avoid slowdown
by adding memory when over workload occur. In addition, this
feature is sometimes used among partition of machine or virtual
machine. One partition can give redundant memory to other partition.