RE: Extremely slow network with e1000 & ip_conntrack

[Feldman, Scott]

> > > I compiled lots of kernels :-( and narrowed it down to between 
> > > 2.5.26 and 2.5.46.
> > > 
> > > Kernel version	Chip		Problem?
> > > 2.4.22		82540EM		N
> > > 2.5.26		82540EM		N
> > > 2.5.46		82540EM		Y
> > > 2.6.0-test10		82540EM		Y
> > > 2.6.0-test11		82540EM		Y
> > > 2.6.0-test11		82547EI		N
> > > 2.4.22nptlsmp		82547EI		N

In e1000, check this out:

  #ifdef NETIF_F_TSO
          if((adapter->hw.mac_type >= e1000_82544) &&
             (adapter->hw.mac_type != e1000_82547))
                  netdev->features |= NETIF_F_TSO;
  #endif

Try turning off TSO by disabling this code or by using "ethtool -K tso
off" (need version 1.8).

-scott
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