K 10
svn:author
V 3
rrs
K 8
svn:date
V 27
2009-02-12T17:31:39.304903Z
K 7
svn:log
V 721
MFC of 184336:

Two inter-related bugs.
  - If we send EXACTLY the size left in the send buffer
    and then send again, we end up with exactly 0 bytes and
    don't hit the pre-block code to wait for more space.
  - If we fall into the loop with our max_len == 0 (the bug
    above) we then call in to copy out the data, setup the length
    of the waiting to transmit data to 0 and call the mbuf copy routine
    which 0 indicates copy all the data to the mbuf chain.. which it
    does. This then leaves a "stuck" message on the stream queue with
    its size exactly 0 bytes but all the data there and thus nothing
    left in the uio structure. We then reach a stuck forever state
    never being able to send data.

END