DragonFly commits List (threaded) for 2007-05
DragonFly BSD
DragonFly commits List (threaded) for 2007-05
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cvs commit: src/sys/kern lwkt_msgport.c lwkt_thread.c src/sys/sys msgport.h msgport2.h src/sys/dev/acpica5/Osd OsdSchedule.c src/sys/net netisr.c src/sys/netinet tcp_syncache.c tcp_usrreq.c

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 23 May 2007 22:51:29 -0700 (PDT)

dillon      2007/05/23 22:51:29 PDT

DragonFly src repository

  Modified files:
    sys/kern             lwkt_msgport.c lwkt_thread.c 
    sys/sys              msgport.h msgport2.h 
    sys/dev/acpica5/Osd  OsdSchedule.c 
    sys/net              netisr.c 
    sys/netinet          tcp_syncache.c tcp_usrreq.c 
  LWKT message ports contain a number of function pointers which abstract
  their backend operation.
  * Add a new function, mp_getport(), which takes over the functionality
    of lwkt_getport().
  * Formalize the default backend and rename it the 'thread' port backend, used
    when a message port will only be drained by a single thread.  This backend
    is able to use critical sections and IPI messages to handle races.
  * Fix a small timing window in the thread port backend where replying a
    synchronous message request from a different cpu may fail to wake up
    the originator who is waiting for the message completion.
  * Abstract-out the message port initialization code and clean up related
    code pollution.
  * Add a new backend called the 'spin' port backend.  This backend can be
    used if a message port might be drained by several different threads.
    For example, this would allow us to use a message port as part of a
    file pointer / file descriptor construct.
  * Add a boot-time tunable, lwkt.use_spin_port (defaults to off) which
    forces spin ports to be used instead of thread ports for the per-thread
    message port.  This is used only for debugging.
  Revision  Changes    Path
  1.41      +458 -121  src/sys/kern/lwkt_msgport.c
  1.108     +11 -1     src/sys/kern/lwkt_thread.c
  1.25      +36 -13    src/sys/sys/msgport.h
  1.14      +7 -0      src/sys/sys/msgport2.h
  1.9       +1 -2      src/sys/dev/acpica5/Osd/OsdSchedule.c
  1.32      +19 -24    src/sys/net/netisr.c
  1.31      +1 -1      src/sys/netinet/tcp_syncache.c
  1.44      +1 -1      src/sys/netinet/tcp_usrreq.c


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