[PATCH][PPC64] Kconfig bits for CONFIG_SPINLINE
From: Paul Mackerras
Date: Thu May 13 2004 - 06:34:04 EST
When I sent the patch to uninline the spinlocks, I inadvertently left
out the change to arch/ppc64/Kconfig which defines the config symbol
for inlining the locks (CONFIG_SPINLINE now). This patch adds it. It
also adds a symbol CONFIG_PPC_SPLPAR which enables the code for
calling the hypervisor on shared-processor logically-partitioned
system to yield the physical processor to the lock holder when
spinning. (The code that depends on this symbol is already present in
diff -urN linux-2.5/arch/ppc64/Kconfig g5-ppc64/arch/ppc64/Kconfig
--- linux-2.5/arch/ppc64/Kconfig 2004-05-11 07:53:04.000000000 +1000
+++ g5-ppc64/arch/ppc64/Kconfig 2004-05-13 21:08:47.621961712 +1000
@@ -93,6 +93,16 @@
bool "Apple PowerMac G5 support"
+ depends on PPC_PSERIES
+ bool "Support for shared-processor logical partitions"
+ default n
+ Enabling this option will make the kernel run more efficiently
+ on logically-partitioned pSeries systems which use shared
+ processors, that is, which share physical processors between
+ two or more partitions.
bool "Enable DART/IOMMU on PowerMac (allow >2G of RAM)"
depends on PPC_PMAC
@@ -407,7 +417,17 @@
debugging info resulting in a larger kernel image.
Say Y here only if you plan to use gdb to debug the kernel.
If you don't debug the kernel, you can say N.
+ bool "Inline spinlock code at each call site"
+ depends on SMP && !PPC_SPLPAR && !PPC_ISERIES
+ Say Y if you want to have the code for acquiring spinlocks
+ and rwlocks inlined at each call site. This makes the kernel
+ somewhat bigger, but can be useful when profiling the kernel.
+ If in doubt, say N.
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