K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2013-09-08T17:51:22.413944Z
K 7
svn:log
V 368
Drain for the xbusy state for two places which potentially do
pmap_remove_all(). Not doing the drain allows the pmap_enter() to
proceed in parallel, making the pmap_remove_all() effects void.

The race results in an invalidated page mapped wired by usermode.

Reported and tested by:	pho
Reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
Approved by:	re (glebius)

END