s390: enable ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT

Deferred struct page initialization works on s390. However it makes
only sense for the fake numa case, since the kthreads that initialize
struct pages are started per node. Without fake numa there is just a
single node and therefore no gain.
However there is no reason to not enable this feature. Therefore
select the config option and enable the feature in all config files.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 1521eda..fc842c4 100644 (file)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -105,6 +105,7 @@ config S390
        select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
        select ARCH_SAVE_PAGE_KEYS if HIBERNATION
        select ARCH_SUPPORTS_ATOMIC_RMW
+       select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
        select ARCH_SUPPORTS_NUMA_BALANCING
        select ARCH_USE_BUILTIN_BSWAP
        select ARCH_USE_CMPXCHG_LOCKREF

diff --git a/arch/s390/configs/default_defconfig b/arch/s390/configs/default_defconfig
index 4b176fe..a5039fa 100644 (file)
--- a/arch/s390/configs/default_defconfig
+++ b/arch/s390/configs/default_defconfig
@@ -73,6 +73,7 @@ CONFIG_ZSWAP=y
 CONFIG_ZBUD=m
 CONFIG_ZSMALLOC=m
 CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEFERRED_STRUCT_PAGE_INIT=y
 CONFIG_IDLE_PAGE_TRACKING=y
 CONFIG_PCI=y
 CONFIG_PCI_DEBUG=y

diff --git a/arch/s390/configs/gcov_defconfig b/arch/s390/configs/gcov_defconfig
index 0de46cc..83970b5 100644 (file)
--- a/arch/s390/configs/gcov_defconfig
+++ b/arch/s390/configs/gcov_defconfig
@@ -72,6 +72,7 @@ CONFIG_ZSWAP=y
 CONFIG_ZBUD=m
 CONFIG_ZSMALLOC=m
 CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEFERRED_STRUCT_PAGE_INIT=y
 CONFIG_IDLE_PAGE_TRACKING=y
 CONFIG_PCI=y
 CONFIG_HOTPLUG_PCI=y

diff --git a/arch/s390/configs/performance_defconfig b/arch/s390/configs/performance_defconfig
index e167557..fbc6542 100644 (file)
--- a/arch/s390/configs/performance_defconfig
+++ b/arch/s390/configs/performance_defconfig
@@ -70,6 +70,7 @@ CONFIG_ZSWAP=y
 CONFIG_ZBUD=m
 CONFIG_ZSMALLOC=m
 CONFIG_ZSMALLOC_STAT=y
+CONFIG_DEFERRED_STRUCT_PAGE_INIT=y
 CONFIG_IDLE_PAGE_TRACKING=y
 CONFIG_PCI=y
 CONFIG_HOTPLUG_PCI=y