d/freebsd-nq
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Back-off on the previous commit, specifically remove the look-ahead

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optimization on the active queue scan.  I will do this correctly later.
This commit is contained in:
John Dyson 1996-07-08 03:22:55 +00:00
parent c8c4b40cca
commit 502ba6e4a8
1 changed files with 3 additions and 11 deletions
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14
sys/vm/vm_pageout.c
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@ -65,7 +65,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_pageout.c,v 1.80 1996/06/29 09:15:39 davidg Exp $
* $Id: vm_pageout.c,v 1.81 1996/07/08 02:25:53 dyson Exp $
*/
/*
@ -564,7 +564,7 @@ vm_pageout_map_deactivate_pages(map, desired)
static int
vm_pageout_scan()
{
vm_page_t m, next, nextnext;
vm_page_t m, next;
int page_shortage, addl_page_shortage, maxscan, maxlaunder, pcount;
int pages_freed;
struct proc *p, *bigproc;
@ -755,22 +755,14 @@ rescan0:
pcount = cnt.v_active_count;
m = TAILQ_FIRST(&vm_page_queue_active);
nextnext = NULL;
while ((m != NULL) && (pcount-- > 0) && (page_shortage > 0)) {
int refcount;
if (m->queue != PQ_ACTIVE) {
m = nextnext;
if ((m == NULL) || (m->queue != PQ_ACTIVE))
break;
break;
}
next = TAILQ_NEXT(m, pageq);
if (next)
nextnext = TAILQ_NEXT(next, pageq);
else
nextnext = NULL;
/*
* Don't deactivate pages that are busy.
*/