Merge branch 'x86/cpufeature' into irq/numa

[sfrench/cifs-2.6.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index bc25b9f5e4cd27583ba2a079850b55858546ef43..b1d3f60525c010f34da659285eabed3157a39d2f 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -274,14 +274,9 @@ config SPARSE_IRQ
 
          If you don't know what to do here, say N.
 
-config NUMA_MIGRATE_IRQ_DESC
-       bool "Move irq desc when changing irq smp_affinity"
+config NUMA_IRQ_DESC
+       def_bool y
        depends on SPARSE_IRQ && NUMA
-       default n
-       ---help---
-         This enables moving irq_desc to cpu/node that irq will use handled.
-
-         If you don't know what to do here, say N.
 
 config X86_MPPARSE
        bool "Enable MPS table" if ACPI
@@ -353,7 +348,8 @@ config X86_UV
        bool "SGI Ultraviolet"
        depends on X86_64
        depends on X86_EXTENDED_PLATFORM
-       select X86_X2APIC
+       depends on NUMA
+       depends on X86_X2APIC
        ---help---
          This option is needed in order to support SGI Ultraviolet systems.
          If you don't have one of these, you should say N here.
@@ -496,6 +492,19 @@ config PARAVIRT
          over full virtualization.  However, when run without a hypervisor
          the kernel is theoretically slower and slightly larger.
 
+config PARAVIRT_SPINLOCKS
+       bool "Paravirtualization layer for spinlocks"
+       depends on PARAVIRT && SMP && EXPERIMENTAL
+       ---help---
+         Paravirtualized spinlocks allow a pvops backend to replace the
+         spinlock implementation with something virtualization-friendly
+         (for example, block the virtual CPU rather than spinning).
+
+         Unfortunately the downside is an up to 5% performance hit on
+         native kernels, with various workloads.
+
+         If you are unsure how to answer this question, answer N.
+
 config PARAVIRT_CLOCK
        bool
        default n
@@ -663,6 +672,7 @@ config MAXSMP
 
 config NR_CPUS
        int "Maximum number of CPUs" if SMP && !MAXSMP
+       range 2 8 if SMP && X86_32 && !X86_BIGSMP
        range 2 512 if SMP && !MAXSMP
        default "1" if !SMP
        default "4096" if MAXSMP