netdev - Re: BUG: TCPDUMP invalid cksum persists after disabling TCP cksum offload

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Message-ID: <20120918222040.GA19201@darkstar>
Date:	Tue, 18 Sep 2012 18:20:40 -0400
From:	Jamie Gloudon <jamie.gloudon@...il.com>
To:	Rick Jones <rick.jones2@...com>
Cc:	Vijay Subramanian <subramanian.vijay@...il.com>,
	netdev@...r.kernel.org
Subject: Re: BUG: TCPDUMP invalid cksum persists after disabling TCP cksum
 offload

Rick is correct. Disabling TX CKO also disable TSO. You can see that in
my ethtool output.

On Tue, Sep 18, 2012 at 02:54:38PM -0700, Rick Jones wrote:
> On 09/18/2012 02:46 PM, Vijay Subramanian wrote:
> >>The results after disabling tcp cksum offload feature:
> >># ethtool -K eth1 tx off
> >
> >Instead of this, can you try
> ># ethtool -K eth1 tso off
> 
> Doesn't TSO depend on TX CKO being enabled?  That is, if TX CKO were
> disabled, shouldn't TSO have been implicitly disabled at the same time?
> 
> rick jones
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