Re: [RFC Patch Part1 V1 00/30] use irqdomain to dynamically allocate IRQ for IOAPIC pin

[Yinghai Lu]

On Fri, May 16, 2014 at 1:05 AM, Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> wrote:
> On x86 platforms, IRQ number are statically allocated to IOAPIC pins at boot.
> There are two issues with this design. First it causes trouble to IOAPIC
> hotplug because we need to allocate a block of IRQ numbers for each IOAPIC.
> Second it may waste IRQ nubmers even if some IOAPIC pins are not used because
> IRQ numbers are statically assigned.
>
> This patchset tries to enable dynamic IRQ number allocation for IOAPIC
> by adopting the irqdomain framework, it solves the two issues mentioned
> above. It also simplifies the IOAPIC driver by consolidating ways to
> program IOAPIC pins with the irqdomain map interface.
>
> We will enhance the IOAPIC driver core to support ACPI based IOAPIC hotplug
> once the IOAPIC driver has been converted to irqdomain.
>
> This patchset applies to v3.15-rc4-260-g38583f095c5a and has been tested
> on a two socket 64 bit Intel platforms with:
> 1) ACPI and mpparse enabled (boot successfully)
> 2) Mpparse enabled with ACPI disabled (boot successfully)
> 3) ACPI enabled with Mpparse disabled (boot successfully)

Great. I don't need to look into using irqdomain for x86 by myself.

Thomas put some irq clean up patches in tip irq branch.

Can you rebase your irqdomain/for x86 on top of that?
Also would be better if you can put your patches in git branch.

Thanks

Yinghai
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/