s kinda serious.

  Depending on NUMA topology, percpu allocator may end up assigning
  overlapping regions for the static percpu areas for different CPUs.
  While critical, the bug has been there for a very long time and only
  few configurations seem to be affected (NUMA configurations w/ no
  memory nodes for example) - so, while it's critical, it isn't exactly
  urgent."

* 'for-3.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  kmemleak: Fix the kmemleak tracking of the percpu areas with !SMP
  percpu: pcpu_embed_first_chunk() should free unused parts after all allocs are complete