Don't free swap in swap_pager_getpages(): this code probably cause the

"dying daemons" problem. (I thought this code was introduced in rev.1.80,
but it just relaxed the condition.)

Also, kill related "suggest more swap space" warning (also introduced in
1.80). It was confusing, to say the least...

Requested by:		msmith
Not objected by:	dg

1 files changed, 1 insertions, 23 deletions

diff --git a/sys/vm/swap_pager.c b/sys/vm/swap_pager.c
index 62733c9..3e2d0de 100644
--- a/sys/vm/swap_pager.c
+++ b/sys/vm/swap_pager.c
@@ -39,7 +39,7 @@
  * from: Utah $Hdr: swap_pager.c 1.4 91/04/30$
  *
  *	@(#)swap_pager.c	8.9 (Berkeley) 3/21/94
- * $Id: swap_pager.c,v 1.103 1998/10/31 15:31:28 peter Exp $
+ * $Id: swap_pager.c,v 1.104 1998/11/19 06:20:42 bde Exp $
  */
 
 /*
@@ -81,7 +81,6 @@
 static int nswiodone;
 int swap_pager_full;
 extern int vm_swap_size;
-static int suggest_more_swap = 0;
 static int no_swap_space = 1;
 static int max_pageout_cluster;
 struct rlisthdr swaplist;
@@ -398,11 +397,6 @@ swap_pager_getswapspace(object, amount, rtval)
 	unsigned location;
 
 	vm_swap_size -= amount;
-	if (!suggest_more_swap && (vm_swap_size < btodb(cnt.v_page_count * PAGE_SIZE))) {
-		printf("swap_pager: suggest more swap space: %d MB\n",
-			(2 * cnt.v_page_count * (PAGE_SIZE / 1024)) / 1000);
-		suggest_more_swap = 1;
-	}
 		
 	if (!rlist_alloc(&swaplist, amount, &location)) {
 		vm_swap_size += amount;
@@ -1128,22 +1122,6 @@ swap_pager_getpages(object, m, count, reqpage)
 		}
 
 		m[reqpage]->object->last_read = m[count-1]->pindex;
-
-		/*
-		 * If we're out of swap space, then attempt to free
-		 * some whenever multiple pages are brought in. We
-		 * must set the dirty bits so that the page contents
-		 * will be preserved.
-		 */
-		if (SWAPLOW ||
-			(vm_swap_size < btodb((cnt.v_page_count - cnt.v_wire_count)) * PAGE_SIZE)) {
-			for (i = 0; i < count; i++) {
-				m[i]->dirty = VM_PAGE_BITS_ALL;
-			}
-			swap_pager_freespace(object,
-				m[0]->pindex + paging_offset, count);
-		}
-
 	} else {
 		swap_pager_ridpages(m, count, reqpage);
 	}