Merge branch 'fix/misc' into for-linus

[karo-tx-linux.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b5cda6c03d1d7572c3188c2d6a98d33f042c9303..a6efe0a2e9ae613a81bedec5e4772698d16541cc 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -277,6 +277,7 @@ config SPARSE_IRQ
 config NUMA_MIGRATE_IRQ_DESC
        bool "Move irq desc when changing irq smp_affinity"
        depends on SPARSE_IRQ && NUMA
+       depends on BROKEN
        default n
        ---help---
          This enables moving irq_desc to cpu/node that irq will use handled.
@@ -497,6 +498,19 @@ 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