netdev - Re: [PATCH net-next v3 0/3] Multiqueue support in virtio-net

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Message-ID: <20121207151330.3cd111a4@samsung-9>
Date:	Fri, 7 Dec 2012 15:13:30 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	jasowang@...hat.com, krkumar2@...ibm.com, kvm@...r.kernel.org,
	mst@...hat.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	bhutchings@...arflare.com, jwhan@...ewood.snu.ac.kr,
	shiyer@...hat.com
Subject: Re: [PATCH net-next v3 0/3] Multiqueue support in virtio-net

On Fri, 07 Dec 2012 15:35:56 -0500 (EST)
David Miller <davem@...emloft.net> wrote:

> From: Jason Wang <jasowang@...hat.com>
> Date: Sat,  8 Dec 2012 01:04:54 +0800
> 
> > This series is an update version (hope the final version) of multiqueue
> > (VIRTIO_NET_F_MQ) support in virtio-net driver. All previous comments were
> > addressed, the work were based on Krishna Kumar's work to let virtio-net use
> > multiple rx/tx queues to do the packets reception and transmission. Performance
> > test show the aggregate latency were increased greately but may get some
> > regression in small packet transmission. Due to this, multiqueue were disabled
> > by default. If user want to benefit form the multiqueue, ethtool -L could be
> > used to enable the feature.
> > 
> > Please review and comments.
> > 
> > A protype implementation of qemu-kvm support could by found in
> > git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you
> > could specify the queues parameters to both tap and virtio-net like:
> > 
> > ./qemu-kvm -netdev tap,queues=2,... -device virtio-net-pci,queues=2,...
> > 
> > then enable the multiqueue through ethtool by:
> > 
> > ethtool -L eth0 combined 2
> 
> It seems like most, if not all, of the feedback given for this series
> has been addressed by Jason.
> 
> Can I get some ACKs?

Other than the minor style nit in the first patch, I see no issues.
This is really needed by Virtual Routers.

Acked-by: Stephen Hemminger <shemminger@...tta.com>

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