Re: [patch 18/19] genirq: Provide Kconfig

Randy Dunlap
2010-09-27T16:44:27Z

On Mon, 27 Sep 2010 12:45:59 -0000 Thomas Gleixner wrote:

> The generic irq Kconfig options are copied around all archs. Provide a
> generic Kconfig file which can be included.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> ---
> kernel/irq/Kconfig | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 49 insertions(+)
>
> Index: linux-2.6-tip/kernel/irq/Kconfig
> ===================================================================
> --- /dev/null
> +++ linux-2.6-tip/kernel/irq/Kconfig
> @@ -0,0 +1,49 @@
> +#
> +# Interrupt subsystem related configuration options
> +#
> +
> +menu "Interrupt handling subsystem"
> +
> +config GENERIC_HARDIRQS
> + def_bool y
> +
> +config GENERIC_HARDIRQS_NO__DO_IRQ
> + def_bool y
> +
> +# Options selectable by the architecture code
> +config HAVE_SPARSE_IRQ
> + def_bool n
> +
> +config GENERIC_IRQ_PROBE
> + def_bool n
> +
> +config GENERIC_PENDING_IRQ
> + def_bool n
> +
> +if SPARSE_IRQ && NUMA
> +config NUMA_IRQ_DESC
> + def_bool n
> +endif
> +
> +config AUTO_IRQ_AFFINITY
> + def_bool n
> +
> +config IRQ_PER_CPU
> + def_bool n
> +
> +config HARDIRQS_SW_RESEND
> + def_bool n
> +
> +config SPARSE_IRQ
> + bool "Support sparse irq numbering"
> + depends on HAVE_SPARSE_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.
> +

I see that this is just moved from another location, but it would be good if
the "irq"s above could be like the one below (IRQ or IRQs).

> + ( 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.

---
~Randy
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