cvs commit: src/sys/kern subr_kdb.c

[Robert Watson]

rwatson     2004-08-15 02:06:27 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             subr_kdb.c 
  Log:
  Add a new sysctl, debug.kdb.stop_cpus, which controls whether or not we
  attempt to IPI other cpus when entering the debugger in order to stop
  them while in the debugger.  The default remains to issue the stop;
  however, that can result in a hang if another cpu has interrupts disabled
  and is spinning, since the IPI won't be received and the KDB will wait
  indefinitely.  We probably need to add a timeout, but this is a useful
  stopgap in the mean time.
  
  Reviewed by:    marcel
  
  Revision  Changes    Path
  1.5       +19 -2     src/sys/kern/subr_kdb.c