[PATCH v8 2/6] powerpc: pSeries/Kconfig: Add qspinlock build config
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STALE3619d
SUPERSEDED
From: Pan Xinhui <hidden>
Date: 2016-12-05 12:08:49
Also in:
lkml, virtualization
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Status: Superseded by v9 (posted 2016-12-06). [go to v9]
Revision v8 (3 revisions archived).
Revisions (3)
- v7 re-posted go to this post
- v8 current [diff against previous]
- v9 [diff against previous]
pSeries/powerNV will use qspinlock from now on. Signed-off-by: Pan Xinhui <redacted> --- 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