@@ -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
pSeries/powerNV will use qspinlock from now on. Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> --- arch/powerpc/platforms/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+)