#config SGI_SN0_XXL # bool "IP27 XXL" # depends on SGI_IP27 # This options adds support for userspace processes upto 16TB size. # Normally the limit is just .5TB. config SGI_SN0_N_MODE bool "IP27 N-Mode" depends on SGI_IP27 help The nodes of Origin 200, Origin 2000 and Onyx 2 systems can be configured in either N-Modes which allows for more nodes or M-Mode which allows for more memory. Your system is most probably running in M-Mode, so you should say N here. config ARCH_DISCONTIGMEM_ENABLE bool default y if SGI_IP27 help Say Y to upport efficient handling of discontiguous physical memory, for architectures which are either NUMA (Non-Uniform Memory Access) or have huge holes in the physical address space for other reasons. See for more. config NUMA bool "NUMA Support" depends on SGI_IP27 help Say Y to compile the kernel to support NUMA (Non-Uniform Memory Access). This option is for configuring high-end multiprocessor server machines. If in doubt, say N. config MAPPED_KERNEL bool "Mapped kernel support" depends on SGI_IP27 help Change the way a Linux kernel is loaded into memory on a MIPS64 machine. This is required in order to support text replication and NUMA. If you need to understand it, read the source code. config REPLICATE_KTEXT bool "Kernel text replication support" depends on SGI_IP27 help Say Y here to enable replicating the kernel text across multiple nodes in a NUMA cluster. This trades memory for speed. config REPLICATE_EXHANDLERS bool "Exception handler replication support" depends on SGI_IP27 help Say Y here to enable replicating the kernel exception handlers across multiple nodes in a NUMA cluster. This trades memory for speed.