Re: [Qemu-devel] [PATCH v18 6/6] hw/vfio/platform: add irqfd support

[Peter Maydell]

On 26 June 2015 at 18:29, Eric Auger <address@hidden> wrote:
> This patch aims at optimizing IRQ handling using irqfd framework.
>
> Instead of handling the eventfds on user-side they are handled on
> kernel side using
> - the KVM irqfd framework,
> - the VFIO driver virqfd framework.
>
> the virtual IRQ completion is trapped at interrupt controller
> This removes the need for fast/slow path swap.
>
> Overall this brings significant performance improvements.
>
> Signed-off-by: Alvise Rigo <address@hidden>
> Signed-off-by: Eric Auger <address@hidden>
> Reviewed-by: Alex Bennée <address@hidden>
> Tested-by: Vikram Sethi <address@hidden>

Acked-by: Peter Maydell <address@hidden>

(by which I mean that I can't see anything obviously
wrong and am happy for this mostly-ARM-related feature
to go in, but am not qualified to review or test it;
I think we've agreed that this patchset will all go
in via Alex Williamson's tree.)

thanks
-- PMM