Dirty the newly copied anonymous pages after the wired region is forked. Otherwise, pagedaemon might reclaim the page without saving its content into the swap file, resulting in the valid content replaced by zeroes.
Dirty the newly copied anonymous pages after the wired region is
forked. Otherwise, pagedaemon might reclaim the page without saving
its content into the swap file, resulting in the valid content
replaced by zeroes.

Reported and tested by:	pho
Reviewed and comment update by:	alc
MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase