cvs commit: src/sys/kern uipc_usrreq.c

Robert Watson rwatson at
Thu Mar 1 09:00:43 UTC 2007

rwatson     2007-03-01 09:00:42 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             uipc_usrreq.c 
  Remove two simultaneous acquisitions of multiple unpcb locks from
  uipc_send in cases where only a global read lock is held by breaking
  them out and avoiding the unpcb lock acquire in the common case.  This
  avoids deadlocks which manifested with X11, and should also marginally
  further improve performance.
  Reported by:    sepotvin, brooks
  Revision  Changes    Path
  1.199     +19 -22    src/sys/kern/uipc_usrreq.c

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