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Groups > linux.kernel > #1536956
| From | Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v9 2/6] powerpc: platforms/Kconfig: Add qspinlock build config |
| Date | 2016-12-06 14:20 +0100 |
| Message-ID | <sLnP3-2vS-7@gated-at.bofh.it> (permalink) |
| References | <sLnP3-2vS-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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
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[PATCH v9 2/6] powerpc: platforms/Kconfig: Add qspinlock build config Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-12-06 14:20 +0100
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