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Date:	Mon, 21 Apr 2014 10:40:55 +0200
From:	Ortwin Glück <>
To:	Eric Dumazet <>
CC:,,, Vlad Yasevich <>
Subject: Re: 3.14 regression: huge latency in read/select on tun

On 20.04.2014 18:31, Eric Dumazet wrote:> On Sat, 2014-04-19 at 22:13
+0200, Ortwin Glück wrote:
>> On 03.04.2014 15:50, Eric Dumazet wrote:
>> I finally found time to bisect this:
>> commit 53d6471cef17262d3ad1c7ce8982a234244f68ec
>> Author: Vlad Yasevich <>
>> Date:   Thu Mar 27 17:26:18 2014 -0400
>>     net: Account for all vlan headers in skb_mac_gso_segment
> Hmm.. probably already solved by commit
> 1e785f48d29a09b6cf96db7b49b6320dada332e1
> ("net: Start with correct mac_len in skb_network_protocol")

Indeed that fixes it. I have cherry picked that onto 3.14 and it works.
That means 1e785f48 should be applied to stable 3.13.y and 3.14.y too.



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