K 10
svn:author
V 3
sam
K 8
svn:date
V 27
2008-04-09T19:07:48.000000Z
K 7
svn:log
V 683
Do image loading in a context known to have a root directory:
o create a private task queue thread that sets up root and current
  directories (hooking mountroot event as needed); this is necessary
  because task queue threads are parented from proc0 and it does not
  have a reference to rootvnode (lost when / mounting moved to init)
o bounce image load + unload requests through the private task q so
  we can load images even when the request is made from a thread that
  does not have sufficient context (e.g. task q thread)
o add a check in the task q thread to fail requests before root is
  mounted (just in case)

Reviewed by:	jhb, mlaier, luigi (glance)
MFC after:	1 month

END