K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2017-01-03T00:05:44.986780Z
K 7
svn:log
V 609
Add a page queue for holding dirty anonymous unswappable pages.

On systems without a configured swap device, an attempt to launder pages
from a swap object will always fail and result in the page being
reactivated. This means that the page daemon will continuously scan pages
that can never be evicted. With this change, anonymous pages are instead
moved to PQ_UNSWAPPABLE after a failed laundering attempt when no swap
devices are configured. PQ_UNSWAPPABLE is not scanned unless a swap device
is configured, so unreferenced unswappable pages are excluded from the page
daemon's workload.

Reviewed by:	alc

END