K 10 svn:author V 6 emaste K 8 svn:date V 27 2006-05-26T18:17:53.000000Z K 7 svn:log V 327 Add sanity checking for QUEUE(3) TAILQs under INVARIANTS (similar to the LIST checks). Races may lead to list corruption, which can be difficult to unravel in a post-mortem analysis. These checks verify that the prev and next pointers are consistent when inserting or removing elements, thus catching any corruption earlier. END