Merge branch 'x86-kbuild-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

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

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3e0f80a764a78b7a50a27d387bae023728805b57..aafae3b140de40269abd0d9e02791853dc5cd1e6 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -279,14 +279,9 @@ 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
@@ -358,7 +353,8 @@ 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.
@@ -501,6 +497,19 @@ 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
@@ -668,6 +677,7 @@ 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