D1544.diff
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	Index: stable/10/sys/amd64/amd64/machdep.c
	===================================================================
	--- stable/10/sys/amd64/amd64/machdep.c
	+++ stable/10/sys/amd64/amd64/machdep.c
	@@ -1590,13 +1590,15 @@
	Maxmem = atop(physmem_tunable);

	/*
	- * By default enable the memory test on real hardware, and disable
	- * it if we appear to be running in a VM. This avoids touching all
	- * pages unnecessarily, which doesn't matter on real hardware but is
	- * bad for shared VM hosts. Use a general name so that
	- * one could eventually do more with the code than just disable it.
	+ * The boot memory test is disabled by default, as it takes a
	+ * significant amount of time on large-memory systems, and is
	+ * unfriendly to virtual machines as it unnecessarily touches all
	+ * pages.
	+ *
	+ * A general name is used as the code may be extended to support
	+ * additional tests beyond the current "page present" test.
	*/
	- memtest = (vm_guest > VM_GUEST_NO) ? 0 : 1;
	+ memtest = 0;
	TUNABLE_ULONG_FETCH("hw.memtest.tests", &memtest);

	/*