K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2013-04-05T10:29:14.899455Z
K 7
svn:log
V 355
MFC r227015:
Add mutex and two flags to make orphan() call properly asynchronous:
 - delay consumer closing and detaching on orphan() until all I/Os complete;
 - prevent new I/Os submission after orphan() called.
Previous implementation could destroy consumers still having active
requests and worked only because of global workaround made on GEOM level.

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