cvs commit: src/sys/kern kern_event.c

[Kelly Yancey]

kbyanc      2003/04/11 18:57:04 PDT

  FreeBSD src repository

  Modified files:
    sys/kern             kern_event.c 
  Log:
  Fix race between a process registering a NOTE_EXIT EVFILT_PROC event and
  the target process exiting which causes attempts to register the kevent
  to randomly fail depending on whether the target runs to completion before
  the parent can call kevent(2).  The bug actually effects EVFILT_PROC
  events on any zombie process, but the most common manifestation is with
  parents trying to monitor child processes.
  
  MFC after:      2 weeks
  Sponsored by:   NTT Multimedia Communications Labs
  
  Revision  Changes    Path
  1.58      +15 -0     src/sys/kern/kern_event.c