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Bug#558426: atl1e performance problems with native IPv6



On Sun, 2009-12-06 at 12:30 +0100, Joerg Pareigis wrote:
> Ben Hutchings schrieb:
> > On Mon, 2009-11-30 at 02:29 +0000, Ben Hutchings wrote:
> >   
> >> On Sat, 2009-11-28 at 21:08 +0100, Joerg Pareigis wrote:
> >>     
> >>> Package: linux-image-2.6-686
> >>> Version: 2.6.26-19lenny2
> >>> Module:  atl1e
> >>>
> >>> IPv4 traffic runs perfect with 100Mbit/s.
> >>> Receiving data with IPv6 is also OK.
> >>> But sending data is horrible like a 9600 modem line.
> >>> tcpdump on the receiving host says: IP6 truncated-ip6 - 1426 bytes missing!
> >>> see below.
> >>>       
> >> [...]
> >>
> >> If you run 'ethtool -K eth0 tso off' (assuming the Atheros adapter is
> >> named 'eth0'), does IPv6 traffic work properly?
> >>     
> >
> > Never mind, this driver does not support that command (this is another
> > bug).  My wife's computer has one of these network adapters so I will
> > experiment on that.
> >
> > Ben.
> Hi Ben,
> at first: Thanks to all of you.
> But, did you test the patch from Jie?
> I did, but nothing happens. Exactly the same as before :-(
> Can you confirm this?

I prepared my own patch and tested that.  However, our general policy is
to apply patches that were accepted upstream, so in the end I applied
Jie Yang's patch.  The critical change is to remove the line
'netdev->features |= NETIF_F_TSO6;' which tells the kernel that the
driver supports TSO for IPv6.  Once that is done, the other code will no
longer be used.

Are you sure the patch was actually applied when you tested?

Ben.

-- 
Ben Hutchings
Never put off till tomorrow what you can avoid all together.

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