Hello Oliver,
On 11/28/20 6:44 PM, Oliver Hartkopp wrote:
On 27.11.20 17:09, Jeroen Hofstee wrote:
Since it took me a while to figure it out, it might be worthwhile to
share.
If a CAN-bus network interface is first set to up and only later used,
the messages received in the meantime are counted by [1] as dropped.
Interesting! But makes sense and is consistent: When the CAN frame is
not processed by the network layer is is just dropped in the rx path.
If the the can module is modprobed before the interface is upped, this
is no longer the case.
Perhaps it saves someone some time.
So far we have not documented these details for the existing netdev
statistics. Do you think this is needed when the behaviour, which
leads to rx-dropped, is common for other netdevs also?
Don't know... Perhaps we should simply wait and see how many
people show up wondering where the rx-dropped frames are
coming from?
Regards,
Jeroen
