netdev - Re: Performance regression with virtio

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Message-ID: <20170731215007-mutt-send-email-mst@kernel.org>
Date:   Mon, 31 Jul 2017 21:50:23 +0300
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Euan Kemp <euan.kemp@...eos.com>
Cc:     seth.forshee@...onical.com, netdev@...r.kernel.org
Subject: Re: Performance regression with virtio_net

On Mon, Jul 31, 2017 at 11:38:00AM -0700, Euan Kemp wrote:
> On Mon, Jul 31, 2017 at 04:26:08PM +0300, Michael S. Tsirkin wrote:
> > I kept this around unchanged from
> > ab7db91705e95ed1bba1304388936fccfa58c992.  That commit had an internal
> > reason not to account for that space: not enough bits to do it.  No
> > longer true so let's account for length exactly.  I'll send a proper
> > patch after a bit of testing, would appreciate reports reports of
> > whether this helps very much.
> 
> I can confirm your patch fixes the issue for me.
> 
> - Euan

Patch posted, thanks everyone.