From: Ingo Molnar Date: Thu, 25 Dec 2008 15:26:47 +0000 (+0100) Subject: x86, sparseirq: clean up Kconfig entry X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=973656fe1afb4adf95d7b9ab75d4660cd3821ea1;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git x86, sparseirq: clean up Kconfig entry Impact: improve help text Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index d14a8806227d..e4c038abb71c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -242,10 +242,14 @@ config SPARSE_IRQ bool "Support sparse irq numbering" depends on PCI_MSI || HT_IRQ help - This enables support for sparse irq, esp for msi/msi-x. You may need - if you have lots of cards supports msi-x installed. + 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. - If you don't know what to do here, say Y. + ( 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"