pagein_debug.patch
dougm (Doug Moore)
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	dougm
	Oct 17 2019, 3:15 PM

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pagein_debug.patch
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	Index: swap_pager.c
	===================================================================
	--- swap_pager.c (revision 353541)
	+++ swap_pager.c (working copy)
	@@ -1687,6 +1687,8 @@
	vm_page_t ma[npages];
	int i, j;

	+ KASSERT(object->type == OBJT_SWAP, ("Not a swap object!"));
	+ KASSERT((object->flags & OBJ_UNMANAGED) == 0, ("Obj not managed!"));
	KASSERT(npages > 0, ("%s: No pages", __func__));
	KASSERT(npages <= MAXPHYS / PAGE_SIZE,
	("%s: Too many pages: %d", __func__, npages));
	@@ -1694,6 +1696,7 @@
	vm_page_grab_pages(object, pindex, VM_ALLOC_NORMAL, ma, npages);
	for (i = j = 0;; i++) {
	/* Count nonresident pages, to page-in all at once. */
	+ KASSERT(i == npages \|\| (ma[i]->oflags & VPO_UNMANAGED) == 0, ("Page not managed!"));
	if (i < npages && ma[i]->valid != VM_PAGE_BITS_ALL)
	continue;
	if (j < i) {
	@@ -1727,6 +1730,7 @@
	daddr_t blk, n_blks, s_blk;
	int i;

	+ KASSERT(object->type == OBJT_SWAP, ("Not a swap object!"));
	n_blks = 0;
	for (pi = 0; (sb = SWAP_PCTRIE_LOOKUP_GE(
	&object->un_pager.swp.swp_blks, pi)) != NULL; ) {