netdev - Re: [PATCH net v2] gso: Update tunnel segmentation to support Tx checksum offload

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <krl4v3$o8d$1@ger.gmane.org>
Date:	Thu, 11 Jul 2013 02:23:31 +0000 (UTC)
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH net v2] gso: Update tunnel segmentation to support Tx
 checksum offload

On Thu, 11 Jul 2013 at 00:42 GMT, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Wed, 2013-07-10 at 17:05 -0700, Alexander Duyck wrote:
>> This change makes it so that the GRE and VXLAN tunnels can make use of Tx
>> checksum offload support provided by some drivers via the hw_enc_features.
>> Without this fix enabling GSO means sacrificing Tx checksum offload and
>> this actually leads to a performance regression as shown below:
>> 
>>             Utilization
>>             Send
>> Throughput  local         GSO
>> 10^6bits/s  % S           state
>>   6276.51   8.39          enabled
>>   7123.52   8.42          disabled
>
> While testing your patch, I discovered TSO support is completely broken
> on GRE, using bnx2x testbed.
>

In my test, GRE works fine, but gretap not.

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html