From 4d65036b4f95e33c41beba3e28eaeebf4f003015 Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 3 Jun 2010 18:34:34 +0000
Subject: [PATCH] Do not leak vm page lock in vm_contig_launder(),
 vm_pageout_page_lock() always returns with the page locked.

Submitted by:	alc
Pointy hat to:	kib
---
 sys/vm/vm_contig.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/vm/vm_contig.c b/sys/vm/vm_contig.c
index 4d896a349a0..025031ec3cc 100644
--- a/sys/vm/vm_contig.c
+++ b/sys/vm/vm_contig.c
@@ -168,8 +168,10 @@ vm_contig_launder(int queue)
 		if ((m->flags & PG_MARKER) != 0)
 			continue;
 
-		if (!vm_pageout_page_lock(m, &next))
+		if (!vm_pageout_page_lock(m, &next)) {
+			vm_page_unlock(m);
 			continue;
+		}
 		KASSERT(VM_PAGE_INQUEUE2(m, queue),
 		    ("vm_contig_launder: page %p's queue is not %d", m, queue));
 		error = vm_contig_launder_page(m, &next);