Author: markj
Date: Sun Jul 7 17:45:17 2019
New Revision: 349812
URL: https://svnweb.freebsd.org/changeset/base/349812
Log:
MFC r349671:
Cache the next queue element when traversing a page queue.
Modified:
stable/12/sys/vm/vm_pageout.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/vm/vm_pageout.c
==============================================================================
--- stable/12/sys/vm/vm_pageout.c Sun Jul 7 17:43:45 2019
(r349811)
+++ stable/12/sys/vm/vm_pageout.c Sun Jul 7 17:45:17 2019
(r349812)
@@ -265,7 +265,7 @@ static __always_inline void
vm_pageout_collect_batch(struct scan_state *ss, const bool dequeue)
{
struct vm_pagequeue *pq;
- vm_page_t m, marker;
+ vm_page_t m, marker, n;
marker = ss->marker;
pq = ss->pq;
@@ -276,7 +276,8 @@ vm_pageout_collect_batch(struct scan_state *ss, const
vm_pagequeue_lock(pq);
for (m = TAILQ_NEXT(marker, plinks.q); m != NULL &&
ss->scanned < ss->maxscan && ss->bq.bq_cnt < VM_BATCHQUEUE_SIZE;
- m = TAILQ_NEXT(m, plinks.q), ss->scanned++) {
+ m = n, ss->scanned++) {
+ n = TAILQ_NEXT(m, plinks.q);
if ((m->flags & PG_MARKER) == 0) {
KASSERT((m->aflags & PGA_ENQUEUED) != 0,
("page %p not enqueued", m));
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