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diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c
--- a/sys/vm/vm_object.c
+++ b/sys/vm/vm_object.c
@@ -1115,13 +1115,14 @@
vm_object_page_collect_flush(vm_object_t object, vm_page_t p, int pagerflags,
int flags, boolean_t *allclean, boolean_t *eio)
{
- vm_page_t ma[2 * vm_pageout_page_count], tp;
- int count, mreq, runlen;
+ vm_page_t ma[2 * vm_pageout_page_count - 1], tp;
+ int base, count, runlen;
vm_page_lock_assert(p, MA_NOTOWNED);
vm_page_assert_xbusied(p);
VM_OBJECT_ASSERT_WLOCKED(object);
- ma[vm_pageout_page_count] = p;
+ base = nitems(ma) / 2;
+ ma[base] = p;
for (count = 1, tp = p; count < vm_pageout_page_count; count++) {
tp = vm_page_next(tp);
if (tp == NULL || vm_page_tryxbusy(tp) == 0)
@@ -1130,10 +1131,10 @@
vm_page_xunbusy(tp);
break;
}
- ma[vm_pageout_page_count + count] = tp;
+ ma[base + count] = tp;
}
- for (mreq = 0, tp = p; count < vm_pageout_page_count; count++, mreq++) {
+ for (tp = p; count < vm_pageout_page_count; count++) {
tp = vm_page_prev(tp);
if (tp == NULL || vm_page_tryxbusy(tp) == 0)
break;
@@ -1141,11 +1142,11 @@
vm_page_xunbusy(tp);
break;
}
- ma[vm_pageout_page_count - 1 - mreq] = tp;
+ ma[--base] = tp;
}
- vm_pageout_flush(&ma[vm_pageout_page_count - mreq], count, pagerflags,
- mreq, &runlen, eio);
+ vm_pageout_flush(&ma[base], count, pagerflags, nitems(ma) / 2 - base,
+ &runlen, eio);
return (runlen);
}
diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c
--- a/sys/vm/vm_pageout.c
+++ b/sys/vm/vm_pageout.c
@@ -348,7 +348,7 @@
vm_pageout_cluster(vm_page_t m)
{
vm_object_t object;
- vm_page_t mc[2 * vm_pageout_page_count], p, pb, ps;
+ vm_page_t mc[2 * vm_pageout_page_count - 1], p, pb, ps;
vm_pindex_t pindex;
int ib, is, page_base, pageout_count;
@@ -358,9 +358,9 @@
vm_page_assert_xbusied(m);
- mc[vm_pageout_page_count] = pb = ps = m;
pageout_count = 1;
- page_base = vm_pageout_page_count;
+ page_base = nitems(mc) / 2;
+ mc[page_base] = pb = ps = m;
ib = 1;
is = 1;

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