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

[safe/jmp/linux-2.6] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 66c1496..0f44add 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -247,6 +247,28 @@ config X86_HAS_BOOT_CPU_ID
        def_bool y
        depends on X86_VOYAGER
 
+config SPARSE_IRQ
+       bool "Support sparse irq numbering"
+       depends on PCI_MSI || HT_IRQ
+       help
+         This enables support for sparse irqs. This is useful for distro
+         kernels that want to define a high CONFIG_NR_CPUS value but still
+         want to have low kernel memory footprint on smaller machines.
+
+         ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
+           out the irq_desc[] array in a more NUMA-friendly way. )
+
+         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"
+       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_FIND_SMP_CONFIG
        def_bool y
        depends on X86_MPPARSE || X86_VOYAGER