K 10
svn:author
V 8
truckman
K 8
svn:date
V 27
2006-01-26T02:33:36.000000Z
K 7
svn:log
V 1192
MFC subr_witness.c 1.198 and 1.200.

Original commit messages:

  Log:
  Track all lock relationships instead of pruning direct relationships
  if an indirect relationship exists (keep both A->B->C and A->C).
  This allows witness_checkorder() to use isitmychild() instead of
  the much more expensive isitmydescendant() to check for valid lock
  ordering.

  Don't do an expensive tree walk to update the w_level values when
  the tree is updated.  Only update the w_level values when using the
  debugger to display the tree.

  Nuke the experimental "witness_watch > 1" mode that only compared
  w_level for the two locks.  This information is no longer maintained
  at run time, and the use of isitmychild() in witness_checkorder
  should bring performance close enough to the acceptable level that
  this hack is not needed.

  Report witness data structure allocation statistics under the
  debug.witness sysctl.

  Reviewed by:    jhb
  MFC after:      30 days

  Log:
  Relocate witness_levelall(), witness_leveldescendents(), and
  witness_displaydescendants() so that they are protected by
  "#ifdef DDB/#endif" to unbreak kernels not using "option DDB".

  MFC after:      3 weeks

END