System halt when out of network buffers

[janovetz at tempest.ece.uiuc.edu (Jake Janovetz)]

Nick,

   I had a similar problem when my board was _generating_ lots of
packets for a certain protocol.  My solution was to increase the
mbufs.  It was really the only solution because I could not lose 
those packets.

   However, I agree that it is better to lose packets than rtems_panic.

    Cheers,
    Jake



On Wed, Jan 19, 2000 at 03:22:26PM -0000, Nick.SIMON at syntegra.bt.co.uk wrote:
> Dear chaps,
> 
> rtems_glue.c kmem_malloc contains:
> 
>         if (networkDaemonTid) {
>                 if (waitflag == M_WAITOK)
>                         rtems_panic (
> "Network mbuf space can not be enlarged after rtems_bsdnet_initialize()
> has\n"
> "returned.  Enlarge the initial mbuf/cluster size in rtems_bsdnet_config.");
>                 return 0;
>         }
> 
> This means that if the network throws lots of data at us, we stop.  This is
> quite easily done to my 50MHz mpc860 board using ping -f.
> 
> It would be better to lose packets than to croak - has anyone crossed this
> bridge already?  Comments, patches etc. gratefully received.
> 
> TIA
> 
> 
> -- Nick Simon 

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