K 10
svn:author
V 3
alc
K 8
svn:date
V 27
2012-10-29T06:15:04.858655Z
K 7
svn:log
V 556
Replace the page hold queue, PQ_HOLD, by a new page flag, PG_UNHOLDFREE,
because the queue itself serves no purpose.  When a held page is freed,
inserting the page into the hold queue has the side effect of setting the
page's "queue" field to PQ_HOLD.  Later, when the page is unheld, it will
be freed because the "queue" field is PQ_HOLD.  In other words, PQ_HOLD is
used as a flag, not a queue.  So, this change replaces it with a flag.

To accomodate the new page flag, make the page's "flags" field wider and
"oflags" field narrower.

Reviewed by:	kib

END