netdev - Re: [PATCH V3 00/15] Packed virtqueue support for vhost

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Message-ID: <20190717102824-mutt-send-email-mst@kernel.org>
Date:   Wed, 17 Jul 2019 10:28:35 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        jfreimann@...hat.com, tiwei.bie@...el.com,
        maxime.coquelin@...hat.com
Subject: Re: [PATCH V3 00/15] Packed virtqueue support for vhost

On Wed, Jul 17, 2019 at 08:27:28PM +0800, Jason Wang wrote:
> 
> On 2019/7/17 下午7:02, Michael S. Tsirkin wrote:
> > On Wed, Jul 17, 2019 at 06:52:40AM -0400, Jason Wang wrote:
> > > Hi all:
> > > 
> > > This series implements packed virtqueues which were described
> > > at [1]. In this version we try to address the performance regression
> > > saw by V2. The root cause is packed virtqueue need more times of
> > > userspace memory accesssing which turns out to be very
> > > expensive. Thanks to the help of 7f466032dc9e ("vhost: access vq
> > > metadata through kernel virtual address"), such overhead cold be
> > > eliminated. So in this version, we can see about 2% improvement for
> > > packed virtqueue on PPS.
> > Great job, thanks!
> > Pls allow a bit more review time than usual as this is a big patchset.
> > Should be done by Tuesday.
> > -next material anyway.
> 
> 
> Sure, just to confirm, I think this should go for your vhost tree?.
> 
> Thanks

I think this makes sense, yes.