With attached config, boot failed on my core i3 machine. Bisection log is also attached (bisectlog). Probably, the patchset from luto@mit.edu (https://lkml.org/lkml/2011/5/26/433) breaks things up.
It seems the following commit is responsible:

  commit f144a6b4d1688675d88990e29567b2335b48205e
  Author: Andy Lutomirski <luto@MIT.EDU>
  Date:   Mon May 23 09:31:30 2011 -0400