From: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Cc: xinhui.pan@linux.vnet.ibm.com, peterz@infradead.org,
benh@kernel.crashing.org, boqun.feng@gmail.com,
virtualization@lists.linux-foundation.org, mingo@redhat.com,
paulus@samba.org, mpe@ellerman.id.au, longman@redhat.com,
paulmck@linux.vnet.ibm.com
Subject: [PATCH v9 2/6] powerpc: platforms/Kconfig: Add qspinlock build config
Date: Tue, 6 Dec 2016 13:09:23 -0500 [thread overview]
Message-ID: <1481047767-60255-3-git-send-email-xinhui.pan@linux.vnet.ibm.com> (raw)
In-Reply-To: <1481047767-60255-1-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/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
next prev parent reply other threads:[~2016-12-06 18:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 18:09 [PATCH v9 0/6] Implement qspinlock/pv-qspinlock on ppc Pan Xinhui
2016-12-06 18:09 ` [PATCH v9 1/6] powerpc/qspinlock: powerpc support qspinlock Pan Xinhui
2016-12-06 18:09 ` Pan Xinhui [this message]
2016-12-06 18:09 ` [PATCH v9 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function Pan Xinhui
2016-12-06 18:09 ` [PATCH v9 4/6] powerpc/pv-qspinlock: powerpc support pv-qspinlock Pan Xinhui
2016-12-06 18:09 ` [PATCH v9 5/6] powerpc: pSeries: Add pv-qspinlock build config/make Pan Xinhui
2016-12-06 18:09 ` [PATCH v9 6/6] powerpc/pv-qspinlock: Optimise native unlock path Pan Xinhui
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