pSeries/powerNV will use qspinlock from now on.
Signed-off-by: Pan Xinhui <xinhui....@linux.vnet.ibm.com>
---
arch/powerpc/platforms/Kconfig | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index fbdae83..3559bbf 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -20,6 +20,15 @@ source "arch/powerpc/platforms/44x/Kconfig"
source "arch/powerpc/platforms/40x/Kconfig"
source "arch/powerpc/platforms/amigaone/Kconfig"
+config ARCH_USE_QUEUED_SPINLOCKS
+ depends on PPC_PSERIES || PPC_POWERNV
+ bool "Enable qspinlock"
+ default y
+ help
+ Enabling this option will let kernel use qspinlock which is a kind of
+ fairlock. It has shown a good performance improvement on x86 and also
+ ppc especially in high contention cases.
+
config KVM_GUEST
bool "KVM Guest support"
default n
--
2.4.11
