K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2019-07-03T18:46:39.131996Z
K 7
svn:log
V 492
Cache the next queue element when traversing a page queue.

When QUEUE_MACRO_DEBUG_TRASH is configured, removing a queue element
invalidates its queue linkage pointers.  vm_pageout_collect_batch()
was relying on these pointers remaining valid after a removal, so
modify it to fetch the next queued page before dequeuing the current
page.

Submitted by:	Don Morris <dgmorris@earthlink.net>
Reviewed by:	cem, vangyzen
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D20842

END