netdev - Re: virtio-net zero-copy

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Message-ID: <bd8f29360905190739n78900b8ep7ca4cdfa8f0259a8@mail.gmail.com>
Date:	Tue, 19 May 2009 22:39:33 +0800
From:	Raju Srivastava <raju.s.linux@...il.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	netdev@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: virtio-net zero-copy

On Mon, May 18, 2009 at 10:00 PM, Avi Kivity <avi@...hat.com> wrote:
> Raju Srivastava wrote:
>>
>> Greetings,
>>
>> Could someone let me know if current virtio-net supports zero-copy? I
>> see some discussion here:
>> http://thread.gmane.org/gmane.comp.emulators.kvm.devel/28061/
>> (copyless virtio net thoughts) and it looks like the copyless
>> virtio-net is not supported by KVM yet.
>
> That is correct.

Thank you for letting me know this.

>> If this is true, then is there
>> any plan to add the zero copy to the virtio-net?
>>
>
> Yes, but it will be a difficult journey.

That's great. I'm looking forward to it. It's said Xen NetChannel 2
has some new features including the zero-copy. Though it would be a
difficult journey, it's really worth, right?

Thanks & Regards,
Raju
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