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Re: [Qemu-devel] [PATCH v18 6/6] hw/vfio/platform: add irqfd support
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [PATCH v18 6/6] hw/vfio/platform: add irqfd support |
Date: |
Mon, 29 Jun 2015 10:49:37 +0100 |
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
- [Qemu-devel] [PATCH v18 2/6] kvm-all.c: add qemu_irq/gsi hash table and utility routines, (continued)
- [Qemu-devel] [PATCH v18 2/6] kvm-all.c: add qemu_irq/gsi hash table and utility routines, Eric Auger, 2015/06/26
- [Qemu-devel] [PATCH v18 3/6] intc: arm_gic_kvm: set the qemu_irq/gsi mapping, Eric Auger, 2015/06/26
- [Qemu-devel] [PATCH v18 5/6] kvm: some fixes to kvm_resamplefds_allowed, Eric Auger, 2015/06/26
- [Qemu-devel] [PATCH v18 4/6] sysbus: add irq_routing_notifier, Eric Auger, 2015/06/26
- [Qemu-devel] [PATCH v18 6/6] hw/vfio/platform: add irqfd support, Eric Auger, 2015/06/26
- Re: [Qemu-devel] [PATCH v18 6/6] hw/vfio/platform: add irqfd support,
Peter Maydell <=