D28924.id84686.diff
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D28924.id84686.diff
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	Index: sys/vm/vm_page.c
	===================================================================
	--- sys/vm/vm_page.c
	+++ sys/vm/vm_page.c
	@@ -2997,6 +2997,16 @@
	(count < npages && req_class == VM_ALLOC_INTERRUPT))
	return (false);

	+ /*
	+ * The caller will attempt an allocation after some runs have been
	+ * reclaimed and added to the vm_phys buddy lists. To ensure that runs
	+ * are not fragmented, round up the requested length to the next power
	+ * of 2 and ensure that each run is self-aligned.
	+ */
	+ npages = 1 << flsl(npages - 1);
	+ if (alignment < ptoa(npages))
	+ alignment = ptoa(npages);
	+
	/*
	* Scan up to three times, relaxing the restrictions ("options") on
	* the reclamation of reservations and superpages each time.