netdev - Re: updated: kvm networking todo wiki

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Message-ID: <87fvx5kkai.fsf@rustcorp.com.au>
Date:	Thu, 30 May 2013 16:48:29 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Stefan Hajnoczi <stefanha@...il.com>
Cc:	Anthony Liguori <anthony@...emonkey.ws>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>, herbert@...dor.hengli.com.au,
	kvm <kvm@...r.kernel.org>, qemu-devel <qemu-devel@...gnu.org>,
	netdev@...r.kernel.org,
	Linux Virtualization <virtualization@...ts.linux-foundation.org>,
	Dmitry Fleytman <dmitry@...nix.com>
Subject: Re: updated: kvm networking todo wiki

Stefan Hajnoczi <stefanha@...il.com> writes:
> On Thu, May 30, 2013 at 7:23 AM, Rusty Russell <rusty@...tcorp.com.au> wrote:
>> On the receive side, what can we do better than readv?  If we need to
>> return to userspace to tell the guest that we've got a new packet, we
>> don't win on latency.  We might reduce syscall overhead with a
>> multi-dimensional readv to read multiple packets at once?
>
> Sounds like recvmmsg(2).

Wow... the future is here, today!

Thanks,
Rusty.

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