netdev - Re: TUN device performance regression

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Date:	Mon, 14 Apr 2014 13:42:39 +0200
From:	Martin Filip <nexus+kernel@...ula.net>
To:	netdev@...r.kernel.org
Subject: Re: TUN device performance regression

> Hello,
> 
> I've noticed significant TUN device performance drop between 3.13 and
> 3.14 kernels, problem seems to persist until current git version.
> 
> With good kernel I can achieve full 100mbps through openvpn without any
> problem, with problematic kernel TX performance drops down to ~50kbps.
> 
> According to git bisect it seems that root of all evil is commit
> 53d6471cef17262d3ad1c7ce8982a234244f68ec.
> 
> I can confirm that performance is great again with current kernel when I
> revert this one.
> 
I've forgot to mention kernel bug:
https://bugzilla.kernel.org/show_bug.cgi?id=74051

-- 
Martin Filip
e-mail: nexus@...ula.net
jabberID: nexus@...ula.net
http://www.smoula.net


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