Re: [PATCH] virtio: Use ioeventfd for virtqueue notify

Anthony Liguori
2010-10-04T01:19:17Z

On 10/03/2010 09:28 AM, Michael S. Tsirkin wrote:
>
>> This is using eventfd as well.
>>
> Sorry, I meant irqfd.
>

I've tried using irqfd in userspace. It hurts performance quite a bit
compared to doing an ioctl so I would suspect this too.

A last_used_idx or similar mechanism should help performance quite a bit
on top of ioeventfd too.

Regards,

Anthony Liguori

>> --
>> error compiling committee.c: too many arguments to function
>>