Bug#572201: forcedeth driver hangs under heavy load

[stephen mulcahy <smulcahy@gmail.com>]

Eric Dumazet wrote:
> Le mardi 13 avril 2010 à 11:03 +0100, stephen mulcahy a écrit :
> > Eric Dumazet wrote:
> > > OK it seems forcedeth has problem with checksums ?
> > >
> > > Try to change "ethtool -k eth0" settings ?
> > >
> > > ethtool -K eth0 tso off tx off
> > Yes, that makes an unresponsive system responsive again immediately, nice!
> >
> > Should the driver default to disabling this until we problem is corrected?
> >
> > -stephen
>
> Both flags need to be disabled, or only one is OK ?

ethtool -K eth0 tx off

fixes the problem (without tso)

but running

ethtool -k eth0
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: off
scatter-gather: off
tcp-segmentation-offload: off
udp-fragmentation-offload: off
generic-segmentation-offload: on
generic-receive-offload: off
large-receive-offload: off

seems to indicate that tso is also disabled by this - does that sound 
correct?

-stephen