Hi, On Thu, May 13, 2010 at 07:48:35PM +0800, Shaohui Zheng wrote: > Userland interface to hotplug-add fake offlined nodes. > > Add a sysfs entry "probe" under /sys/devices/system/node/: > > - to show all fake offlined nodes: > $ cat /sys/devices/system/node/probe > > - to hotadd a fake offlined node, e.g. nodeid is N: > $ echo N > /sys/devices/system/node/probe > > Signed-off-by: Haicheng Li <haicheng.li@xxxxxxxxxxxxxxx> > Signed-off-by: Shaohui Zheng <shaohui.zheng@xxxxxxxxx> > --- > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 9458685..2c078c8 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -1214,6 +1214,20 @@ config NUMA_EMU > into virtual nodes when booted with "numa=fake=N", where N is the > number of nodes. This is only useful for debugging. > > +config NUMA_HOTPLUG_EMU > + bool "NUMA hotplug emulator" > + depends on X86_64 && NUMA && HOTPLUG > + ---help--- > + > +config NODE_HOTPLUG_EMU > + bool "Node hotplug emulation" > + depends on NUMA_HOTPLUG_EMU && MEMORY_HOTPLUG > + ---help--- > + Enable Node hotplug emulation. The machine will be setup with > + hidden virtual nodes when booted with "numa=hide=N*size", where > + N is the number of hidden nodes, size is the memory size per > + hidden node. This is only useful for debugging. > + The above dependencies do not work as expected. I could configure NUMA_HOTPLUG_EMU & NODE_HOTPLUG_EMU without having MEMORY_HOTPLUG turned on. By pushing the above definition below SPARSEMEM and memory hot add and remove, the dependencies could be sorted out. -- Regards, Ankita Garg (ankita@xxxxxxxxxx) Linux Technology Center IBM India Systems & Technology Labs, Bangalore, India -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>