On Mon, Dec 05, 2016 at 10:19:22AM -0500, Pan Xinhui wrote: > pSeries/powerNV will use qspinlock from now on. > > Signed-off-by: Pan Xinhui <xinhui....@linux.vnet.ibm.com> > --- > arch/powerpc/platforms/pseries/Kconfig | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/powerpc/platforms/pseries/Kconfig > b/arch/powerpc/platforms/pseries/Kconfig > index bec90fb..8a87d06 100644 > --- a/arch/powerpc/platforms/pseries/Kconfig > +++ b/arch/powerpc/platforms/pseries/Kconfig
Why here? Not arch/powerpc/platforms/Kconfig?
> @@ -23,6 +23,14 @@ config PPC_PSERIES
> select PPC_DOORBELL
> default y
>
> +config ARCH_USE_QUEUED_SPINLOCKS
> + default y
> + bool "Enable qspinlock"
I think you just enable qspinlock by default for all PPC platforms. I
guess you need to put
depends on PPC_PSERIES || PPC_POWERNV
here to achieve what you mean in you commit message.
Regards,
Boqun
> + 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 PPC_SPLPAR
> depends on PPC_PSERIES
> bool "Support for shared-processor logical partitions"
> --
> 2.4.11
>
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