From 8e1d8de578b383b15bc5a4f89cfed9a4f6c481b2 Mon Sep 17 00:00:00 2001
From: Alan Cox <alc@FreeBSD.org>
Date: Sun, 2 Feb 2003 01:11:21 +0000
Subject: [PATCH]  - Convert vm_pageout()'s tsleep()s to msleep()s with the
 page queue lock.

---
 sys/vm/vm_pageout.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c
index bb92fdd6f5d1..79cc7ed239e4 100644
--- a/sys/vm/vm_pageout.c
+++ b/sys/vm/vm_pageout.c
@@ -1432,6 +1432,7 @@ vm_pageout()
 	 */
 	while (TRUE) {
 		s = splvm();
+		vm_page_lock_queues();
 		/*
 		 * If we have enough free memory, wakeup waiters.  Do
 		 * not clear vm_pages_needed until we reach our target,
@@ -1451,7 +1452,7 @@ vm_pageout()
 			 */
 			++pass;
 			if (pass > 1)
-				tsleep(&vm_pages_needed, PVM,
+				msleep(&vm_pages_needed, &vm_page_queue_mtx, PVM,
 				       "psleep", hz/2);
 		} else {
 			/*
@@ -1462,9 +1463,10 @@ vm_pageout()
 				pass = 1;
 			else
 				pass = 0;
-			error = tsleep(&vm_pages_needed, PVM,
+			error = msleep(&vm_pages_needed, &vm_page_queue_mtx, PVM,
 				    "psleep", vm_pageout_stats_interval * hz);
 			if (error && !vm_pages_needed) {
+				vm_page_unlock_queues();
 				splx(s);
 				pass = 0;
 				vm_pageout_page_stats();
@@ -1473,6 +1475,7 @@ vm_pageout()
 		}
 		if (vm_pages_needed)
 			cnt.v_pdwakeups++;
+		vm_page_unlock_queues();
 		splx(s);
 		vm_pageout_scan(pass);
 	}