git: kernel - Fix localhost packet misordering

Matthew Dillon dillon at
Thu Nov 3 22:47:55 PDT 2011

commit 392cd266cf0fd6bc128fba0cd2b0cf1f757f5628
Author: Matthew Dillon <dillon at>
Date:   Thu Nov 3 22:25:31 2011 -0700

    kernel - Fix localhost packet misordering
    * netisr thread ports are based on IPIs, but when we enable asynch socket
      writes a user thread which gets moved between cpus sending async netmsgs
      while doing so can result in the netisr receiving those messages out
      of order, corrupting the data stream.
    * Add TDF_FORCE_SPINPORT to allow the netisr threads to implement their
      message ports as spinports instead of threadports, which guarantees
      message ordering.

Summary of changes:
 sys/kern/lwkt_thread.c |    2 +-
 sys/net/if.c           |    3 ++-
 sys/net/netisr.c       |    4 ++--
 sys/sys/thread.h       |    2 +-
 4 files changed, 6 insertions(+), 5 deletions(-)

DragonFly BSD source repository

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