K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2013-08-25T17:26:05.877484Z
K 7
svn:log
V 353
Add more conditions when GEOM direct dispatch should not be used:
 - on down path when BIO is unmapped and we can't sleep (mapping may sleep);
 - when we are already in one of GEOM threads (direct call won't save much);
 - when more then half of thread stack size is already used (use the same
mechanism as used by netgraph -- GET_STACK_USAGE() macro).

END