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Message-Id: <1480951166-44830-3-git-send-email-xinhui.pan@linux.vnet.ibm.com>
Date: Mon, 5 Dec 2016 10:19:22 -0500
From: Pan Xinhui <xinhui.pan@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: linuxppc-dev@...ts.ozlabs.org, benh@...nel.crashing.org,
paulus@...ba.org, mpe@...erman.id.au, peterz@...radead.org,
mingo@...hat.com, paulmck@...ux.vnet.ibm.com, waiman.long@....com,
xinhui.pan@...ux.vnet.ibm.com,
virtualization@...ts.linux-foundation.org, boqun.feng@...il.com
Subject: [PATCH v8 2/6] powerpc: pSeries/Kconfig: Add qspinlock build config
pSeries/powerNV will use qspinlock from now on.
Signed-off-by: Pan Xinhui <xinhui.pan@...ux.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
@@ -23,6 +23,14 @@ config PPC_PSERIES
select PPC_DOORBELL
default y
+config ARCH_USE_QUEUED_SPINLOCKS
+ default y
+ bool "Enable qspinlock"
+ 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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