cvs commit: src/sys/kern kern_module.c

[Don Lewis]

truckman    2004-08-20 21:47:48 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_module.c 
  Log:
  Don't bother calling the module event handlers from module_shutdown()
  in the shutdown_final state if the RB_NOSYNC flag is set.
  
  The specific motivation in this case is that a system panic in an
  interrupt context results in a call to module_shutdown(), which
  calls g_modevent(), which calls g_malloc(..., M_WAITOK), which
  results in a second panic.   While g_modevent() could be fixed to
  not call malloc() for MOD_SHUTDOWN events (which it doesn't handle
  in any case), it is probably also a good idea to entirely skip the
  execution of the module shutdown handlers after a panic.
  
  This may be a MFC candidate for RELENG_5.
  
  Revision  Changes    Path
  1.46      +3 -0      src/sys/kern/kern_module.c