powerpc: Enable KSM on pseries and ppc64 defconfigs

KSM will only be used on areas marked for merging via madvise, and it
is showing nice improvements on KVM workloads, so enable it by
default.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
index 0fd22dfe00d130a55e8dad495bad59588c91f343..897869ce22aa2b0984f3f1abdb41f05fe468e1a4 100644 (file)
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -49,6 +49,7 @@ CONFIG_KEXEC=y
 CONFIG_CRASH_DUMP=y
 CONFIG_IRQ_ALL_CPUS=y
 CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_KSM=y
 CONFIG_SCHED_SMT=y
 CONFIG_PCCARD=y
 CONFIG_ELECTRA_CF=y

diff --git a/arch/powerpc/configs/pseries_defconfig b/arch/powerpc/configs/pseries_defconfig
index ffd4bbd483f9d66f1d0380ba52dcb4fda432b9e6..7677850e2b0766d332e6006c4a44f9b4d114acf4 100644 (file)
--- a/arch/powerpc/configs/pseries_defconfig
+++ b/arch/powerpc/configs/pseries_defconfig
@@ -46,6 +46,7 @@ CONFIG_KEXEC=y
 CONFIG_IRQ_ALL_CPUS=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_KSM=y
 CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_PPC_64K_PAGES=y
 CONFIG_PPC_SUBPAGE_PROT=y

diff --git a/arch/powerpc/configs/pseries_le_defconfig b/arch/powerpc/configs/pseries_le_defconfig
index 66db64ad95f2a4e72bf35af612a8f8ca1ccd15a5..acb611a268365809ad1c496f22ce36c1c7dd9a33 100644 (file)
--- a/arch/powerpc/configs/pseries_le_defconfig
+++ b/arch/powerpc/configs/pseries_le_defconfig
@@ -47,6 +47,7 @@ CONFIG_KEXEC=y
 CONFIG_IRQ_ALL_CPUS=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_KSM=y
 CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_PPC_64K_PAGES=y
 CONFIG_PPC_SUBPAGE_PROT=y