On Thu, 2 Dec 2010, Shaohui Zheng wrote: > so we should still keep the sysfs memory/probe interface without any modifications, > but for the debugfs mem_hotplug/probe interface, we can add the memory region > to a desired node. This feature would be distinct from the add_node interface already provided: instead of hotplugging a new node to test the memory hotplug callbacks, this new interface would only be hotadding new memory to a node other than the one it has physical affinity with. For that support, I'd suggest new probe files in debugfs for each online node: /sys/kernel/debug/mem_hotplug/add_node (already exists) /sys/kernel/debug/mem_hotplug/node0/add_memory /sys/kernel/debug/mem_hotplug/node1/add_memory ... and then you can offline and remove that memory with the existing hotplug support (CONFIG_MEMORY_HOTPLUG and CONFIG_MEMORY_HOTREMOVE, respectively). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>