One spelling nit. May also want to explain the 'ripa' term more clearly somewhere.
http://codereview.appspot.com/5746044/diff/11001/ipa.c File ipa.c (right): http://codereview.appspot.com/5746044/diff/11001/ipa.c#newcode811 ipa.c:811: (2) the VNODE is neede, and s/neede/needed/ http://codereview.appspot.com/5746044/
