summaryrefslogtreecommitdiff
path: root/arch/s390/Kconfig
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/Kconfig')
-rw-r--r--arch/s390/Kconfig76
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index b06dc3839..1d57000b1 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -48,6 +48,7 @@ config ARCH_SUPPORTS_DEBUG_PAGEALLOC
config KEXEC
def_bool y
+ select KEXEC_CORE
config AUDIT_ARCH
def_bool y
@@ -99,18 +100,22 @@ config S390
select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
select ARCH_SAVE_PAGE_KEYS if HIBERNATION
select ARCH_SUPPORTS_ATOMIC_RMW
+ select ARCH_SUPPORTS_NUMA_BALANCING
select ARCH_USE_CMPXCHG_LOCKREF
+ select ARCH_WANTS_PROT_NUMA_PROT_NONE
select ARCH_WANT_IPC_PARSE_VERSION
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS2
select DYNAMIC_FTRACE if FUNCTION_TRACER
select GENERIC_CLOCKEVENTS
+ select GENERIC_CPU_AUTOPROBE
select GENERIC_CPU_DEVICES if !SMP
select GENERIC_FIND_FIRST_BIT
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
select HAVE_ARCH_AUDITSYSCALL
+ select HAVE_ARCH_EARLY_PFN_TO_NID
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
@@ -153,6 +158,7 @@ config S390
select VIRT_CPU_ACCOUNTING
select VIRT_TO_BUS
+
config SCHED_OMIT_FRAME_POINTER
def_bool y
@@ -385,6 +391,76 @@ config HOTPLUG_CPU
config SCHED_SMT
def_bool n
+# Some NUMA nodes have memory ranges that span
+# other nodes. Even though a pfn is valid and
+# between a node's start and end pfns, it may not
+# reside on that node. See memmap_init_zone()
+# for details. <- They meant memory holes!
+config NODES_SPAN_OTHER_NODES
+ def_bool NUMA
+
+config NUMA
+ bool "NUMA support"
+ depends on SMP && 64BIT && SCHED_TOPOLOGY
+ default n
+ help
+ Enable NUMA support
+
+ This option adds NUMA support to the kernel.
+
+ An operation mode can be selected by appending
+ numa=<method> to the kernel command line.
+
+ The default behaviour is identical to appending numa=plain to
+ the command line. This will create just one node with all
+ available memory and all CPUs in it.
+
+config NODES_SHIFT
+ int "Maximum NUMA nodes (as a power of 2)"
+ range 1 10
+ depends on NUMA
+ default "4"
+ help
+ Specify the maximum number of NUMA nodes available on the target
+ system. Increases memory reserved to accommodate various tables.
+
+menu "Select NUMA modes"
+ depends on NUMA
+
+config NUMA_EMU
+ bool "NUMA emulation"
+ default y
+ help
+ Numa emulation mode will split the available system memory into
+ equal chunks which then are distributed over the configured number
+ of nodes in a round-robin manner.
+
+ The number of fake nodes is limited by the number of available memory
+ chunks (i.e. memory size / fake size) and the number of supported
+ nodes in the kernel.
+
+ The CPUs are assigned to the nodes in a way that partially respects
+ the original machine topology (if supported by the machine).
+ Fair distribution of the CPUs is not guaranteed.
+
+config EMU_SIZE
+ hex "NUMA emulation memory chunk size"
+ default 0x10000000
+ range 0x400000 0x100000000
+ depends on NUMA_EMU
+ help
+ Select the default size by which the memory is chopped and then
+ assigned to emulated NUMA nodes.
+
+ This can be overridden by specifying
+
+ emu_size=<n>
+
+ on the kernel command line where also suffixes K, M, G, and T are
+ supported.
+
+endmenu
+
config SCHED_MC
def_bool n