D49200.diff
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	diff --git a/sys/vm/vnode_pager.c b/sys/vm/vnode_pager.c
	--- a/sys/vm/vnode_pager.c
	+++ b/sys/vm/vnode_pager.c
	@@ -1045,18 +1045,13 @@
	vm_page_t mpred, p;

	VM_OBJECT_WLOCK(object);
	- startpindex = m[0]->pindex - rbehind;
	- if ((mpred = TAILQ_PREV(m[0], pglist, listq)) != NULL &&
	- mpred->pindex >= startpindex)
	- startpindex = mpred->pindex + 1;
	+ tpindex = m[0]->pindex;
	+ startpindex = MAX(tpindex, rbehind) - rbehind;
	+ if ((mpred = TAILQ_PREV(m[0], pglist, listq)) != NULL)
	+ startpindex = MAX(startpindex, mpred->pindex + 1);

	- /*
	- * tpindex is unsigned; beware of numeric underflow.
	- * Stepping backward from pindex, mpred doesn't change.
	- */
	- for (tpindex = m[0]->pindex - 1;
	- tpindex >= startpindex && tpindex < m[0]->pindex;
	- tpindex--, i++) {
	+ /* Stepping backward from pindex, mpred doesn't change. */
	+ for (; tpindex-- > startpindex; i++) {
	p = vm_page_alloc_after(object, tpindex,
	VM_ALLOC_NORMAL, mpred);
	if (p == NULL) {