From: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org, benh@kernel.crashing.org,
paulus@samba.org, mpe@ellerman.id.au, peterz@infradead.org,
mingo@redhat.com, paulmck@linux.vnet.ibm.com,
waiman.long@hpe.com, xinhui.pan@linux.vnet.ibm.com,
virtualization@lists.linux-foundation.org, boqun.feng@gmail.com
Subject: [PATCH v8 2/6] powerpc: pSeries/Kconfig: Add qspinlock build config
Date: Mon, 5 Dec 2016 10:19:22 -0500 [thread overview]
Message-ID: <1480951166-44830-3-git-send-email-xinhui.pan@linux.vnet.ibm.com> (raw)
In-Reply-To: <1480951166-44830-1-git-send-email-xinhui.pan@linux.vnet.ibm.com>
pSeries/powerNV will use qspinlock from now on.
Signed-off-by: Pan Xinhui <xinhui.pan@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
@@ -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
next prev parent reply other threads:[~2016-12-05 10:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-05 15:19 [PATCH v8 0/6] Implement qspinlock/pv-qspinlock on ppc Pan Xinhui
2016-12-05 15:19 ` [PATCH v8 1/6] powerpc/qspinlock: powerpc support qspinlock Pan Xinhui
2016-12-06 0:47 ` Boqun Feng
2016-12-06 1:16 ` Pan Xinhui
2016-12-05 15:19 ` Pan Xinhui [this message]
2016-12-06 0:58 ` [PATCH v8 2/6] powerpc: pSeries/Kconfig: Add qspinlock build config Boqun Feng
2016-12-06 1:24 ` Pan Xinhui
2016-12-06 2:12 ` Pan Xinhui
2016-12-05 15:19 ` [PATCH v8 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function Pan Xinhui
2016-12-06 1:23 ` Boqun Feng
2016-12-06 1:30 ` Pan Xinhui
2016-12-05 15:19 ` [PATCH v8 4/6] powerpc/pv-qspinlock: powerpc support pv-qspinlock Pan Xinhui
2016-12-05 15:19 ` [PATCH v8 5/6] powerpc: pSeries: Add pv-qspinlock build config/make Pan Xinhui
2016-12-05 15:19 ` [PATCH v8 6/6] powerpc/pv-qspinlock: Optimise native unlock path Pan Xinhui
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