• Ying Xue's avatar
    tipc: remove the bearer congestion mechanism · 3c294cb3
    Ying Xue authored
    
    
    Currently at the TIPC bearer layer there is the following congestion
    mechanism:
    
    Once sending packets has failed via that bearer, the bearer will be
    flagged as being in congested state at once. During bearer congestion,
    all packets arriving at link will be queued on the link's outgoing
    buffer.  When we detect that the state of bearer congestion has
    relaxed (e.g. some packets are received from the bearer) we will try
    our best to push all packets in the link's outgoing buffer until the
    buffer is empty, or until the bearer is congested again.
    
    However, in fact the TIPC bearer never receives any feedback from the
    device layer whether a send was successful or not, so it must always
    assume it was successful. Therefore, the bearer congestion mechanism
    as it exists currently is of no value.
    
    But the bearer blocking state is still useful for us. For example,
    when the physical media goes down/up, we need to change the state of
    the links bound to the bearer.  So the code maintaing the state
    information is not removed.
    
    Signed-off-by: Ying Xue's avatarYing Xue <ying.xue@windriver.com>
    Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
    3c294cb3