On Tue, 2007-07-31 at 17:51 +0200, Darren Reed wrote:
> Garrett D'Amore wrote:
> > ...
> > I _think_ it works out that for receive there is no problem... the
> > checksum will be verified fine ... but unfortunately we have no way in
> > the stack to register to provide rx checksum offload without also
> > offering to provide tx checksum offload.
>
> Heh...and on BSD this would be done with:
>
> # ifconfig hme0 udp4csum-rx -udp4csum-tx
>
>
> In light of "this problem", it might be worth looking at extending
> Brussels to enable Solaris to provide the same level of management
> for "the future"....
>
>
> Has anyone verified whether or not the same problem exists with
> another operating system such as NetBSD (I don't have any handy
> with hme's in them) to get an idea about whether it is the OS or
> the hardware?
It would appear that NetBSD, at least, suffers from the same problem
with TCP and UDP on hme interfaces.
Interestingly enough, I'm not confident that NetBSD won't have the same
problem with tiny packets that we enountered. (Much of the original hw
cksum implementation I borrowed from NetBSD originally.... to avoid
taining with qfe sources which are not yet open.)
-- Garrett
>
> Darren
>
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