netdev - Re: [PATCH net-next v3 00/13] virtio: support packed ring

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Date:   Mon, 26 Nov 2018 22:18:04 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     mst@...hat.com
Cc:     tiwei.bie@...el.com, jasowang@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        virtio-dev@...ts.oasis-open.org, wexu@...hat.com,
        jfreimann@...hat.com, maxime.coquelin@...hat.com
Subject: Re: [PATCH net-next v3 00/13] virtio: support packed ring

From: "Michael S. Tsirkin" <mst@...hat.com>
Date: Tue, 27 Nov 2018 01:08:08 -0500

> On Wed, Nov 21, 2018 at 06:03:17PM +0800, Tiwei Bie wrote:
>> Hi,
>> 
>> This patch set implements packed ring support in virtio driver.
>> 
>> A performance test between pktgen (pktgen_sample03_burst_single_flow.sh)
>> and DPDK vhost (testpmd/rxonly/vhost-PMD) has been done, I saw
>> ~30% performance gain in packed ring in this case.
>> 
>> To make this patch set work with below patch set for vhost,
>> some hacks are needed to set the _F_NEXT flag in indirect
>> descriptors (this should be fixed in vhost):
>> 
>> https://lkml.org/lkml/2018/7/3/33
> 
> I went over it and I think it's correct spec-wise.
> 
> I have some ideas for enhancements but let's start
> with getting this stuff merged first.
> 
> Acked-by: Michael S. Tsirkin <mst@...hat.com>

Series applied.