1. 24 8月, 2014 3 次提交
    • J
      tipc: use pseudo message to wake up sockets after link congestion · 50100a5e
      Jon Paul Maloy 提交于
      The current link implementation keeps a linked list of blocked ports/
      sockets that is populated when there is link congestion. The purpose
      of this is to let the link know which users to wake up when the
      congestion abates.
      
      This adds unnecessary complexity to the data structure and the code,
      since it forces us to involve the link each time we want to delete
      a socket. It also forces us to grab the spinlock port_lock within
      the scope of node_lock. We want to get rid of this direct dependence,
      as well as the deadlock hazard resulting from the usage of port_lock.
      
      In this commit, we instead let the link keep list of a "wakeup" pseudo
      messages for use in such situations. Those messages are sent to the
      pending sockets via the ordinary message reception path, and wake up
      the socket's owner when they are received.
      
      This enables us to get rid of the 'waiting_ports' linked lists in struct
      tipc_port that manifest this direct reference. As a consequence, we can
      eliminate another BH entry into the socket, and hence the need to grab
      port_lock. This is a further step in our effort to remove port_lock
      altogether.
      Signed-off-by: NJon Maloy <jon.maloy@ericsson.com>
      Reviewed-by: NErik Hugne <erik.hugne@ericsson.com>
      Reviewed-by: NYing Xue <ying.xue@windriver.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      50100a5e
    • J
      tipc: introduce new function tipc_msg_create() · 1dd0bd2b
      Jon Paul Maloy 提交于
      The function tipc_msg_init() has turned out to be of limited value
      in many cases. It take too few parameters to be usable for creating
      a complete message, it makes too many assumptions about what the
      message should be used for, and it does not allocate any buffer to
      be returned to the caller.
      
      Therefore, we now introduce the new function tipc_msg_create(), which
      takes all the parameters needed to create a full message, and returns
      a buffer of the requested size. The new function will be very useful
      for the changes we will be doing in later commits in this series.
      Signed-off-by: NJon Maloy <jon.maloy@ericsson.com>
      Reviewed-by: NErik Hugne <erik.hugne@ericsson.com>
      Reviewed-by: NYing Xue <ying.xue@windriver.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1dd0bd2b
    • D
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · f9474ddf
      David S. Miller 提交于
      Pulling to get some TIPC fixes that a net-next series depends
      upon.
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f9474ddf
  2. 23 8月, 2014 37 次提交