PROBLEM REPORT 2.4.20-rc1: sundance.c

PROBLEM REPORT 2.4.20-rc1: sundance.c

[Stephan von Krawczynski]

Hello all,

I'd like to point out that (at least) the network driver sundance.c has weird
flaws when trying to use more than MAX_UNITS (8) cards at the same time. Since
this driver can be used for DFE-580TX 4 port network card it is really easy to
get more than 8 ports :-)
In fact the driver does check against MAX_UNITS, but does _not_ fail if you go
through the roof. Instead you can expect really interesting ifconfig-outputs
;-)
IMHO it should check and fail. I wonder what other card drivers do in such a
case ...
-- 
Regards,
Stephan

Re: PROBLEM REPORT 2.4.20-rc1: sundance.c (OT: userspace)

[Stephan von Krawczynski]

... and to have even more fun:
"ifconfig" coming with SuSE 8.1 produces broken output list if there is ethX
with X>9.
(just in case someone is listening ... ;-)
-- 
Regards,
Stephan

Re: PROBLEM REPORT 2.4.20-rc1: sundance.c

[Jeff Garzik]

Stephan von Krawczynski wrote:

>Hello all,
>
>I'd like to point out that (at least) the network driver sundance.c has weird
>flaws when trying to use more than MAX_UNITS (8) cards at the same time. Since
>

Smileys nonwithstanding, you need to include far more information

Please define "weird flaws"... explicitly.

>this driver can be used for DFE-580TX 4 port network card it is really easy to
>get more than 8 ports :-)
>In fact the driver does check against MAX_UNITS, but does _not_ fail if you go
>through the roof. Instead you can expect really interesting ifconfig-outputs
>;-)
>IMHO it should check and fail. I wonder what other card drivers do in such a
>case ...
>  
>

Other card drivers handle this case just fine.  The expected behavior is 
that module options will only support up to MAX_UNITS of certain 
arguments, but beyond that nothing is affected at all.

    Jeff

Re: PROBLEM REPORT 2.4.20-rc1: sundance.c

[Stephan von Krawczynski]

On Thu, 31 Oct 2002 16:04:10 -0500
Jeff Garzik <jgarzik@pobox.com> wrote:

> Stephan von Krawczynski wrote:
> 
> >Hello all,
> >
> >I'd like to point out that (at least) the network driver sundance.c has
> >weird flaws when trying to use more than MAX_UNITS (8) cards at the same
> >time. Since
> >
> 
> Smileys nonwithstanding, you need to include far more information
> 
> Please define "weird flaws"... explicitly.

I am experiencing dropped packets as sundance RX side when simple nfs copying
takes places. These are at a rate of about 1-2% of RX packets. I call it
"weird" because I cannot see a definitive problem location in the driver
source. fact stays one simple copy drops packets, something I never saw in the
same setup (same cabling, same mainboard) with tulip cards.
I know that this is a hell of a "bug-report", but I really want to point out
only a strange difference between tulip-setup and sundance-setup.
-- 
Regards,
Stephan