D12084.id32460.diff
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D12084.id32460.diff
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	Index: head/sys/vm/vm_pageout.c
	===================================================================
	--- head/sys/vm/vm_pageout.c
	+++ head/sys/vm/vm_pageout.c
	@@ -402,6 +402,8 @@
	*/
	vm_page_assert_unbusied(m);
	KASSERT(m->hold_count == 0, ("page %p is held", m));
	+
	+ pmap_remove_write(m);
	vm_page_unlock(m);

	mc[vm_pageout_page_count] = pb = ps = m;
	@@ -444,6 +446,7 @@
	ib = 0;
	break;
	}
	+ pmap_remove_write(p);
	vm_page_unlock(p);
	mc[--page_base] = pb = p;
	++pageout_count;
	@@ -469,6 +472,7 @@
	vm_page_unlock(p);
	break;
	}
	+ pmap_remove_write(p);
	vm_page_unlock(p);
	mc[page_base + pageout_count] = ps = p;
	++pageout_count;
	@@ -513,8 +517,8 @@
	VM_OBJECT_ASSERT_WLOCKED(object);

	/*
	- * Initiate I/O. Bump the vm_page_t->busy counter and
	- * mark the pages read-only.
	+ * Initiate I/O. Mark the pages busy and verify that they're valid
	+ * and read-only.
	*
	* We do not have to fixup the clean/dirty bits here... we can
	* allow the pager to do it after the I/O completes.
	@@ -526,8 +530,9 @@
	KASSERT(mc[i]->valid == VM_PAGE_BITS_ALL,
	("vm_pageout_flush: partially invalid page %p index %d/%d",
	mc[i], i, count));
	+ KASSERT((mc[i]->aflags & PGA_WRITEABLE) == 0,
	+ ("vm_pageout_flush: writeable page %p", mc[i]));
	vm_page_sbusy(mc[i]);
	- pmap_remove_write(mc[i]);
	}
	vm_object_pip_add(object, count);