D13308.id.diff
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D13308.id.diff
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	Index: sys/vm/vm_pageout.c
	===================================================================
	--- sys/vm/vm_pageout.c
	+++ sys/vm/vm_pageout.c
	@@ -1815,10 +1815,18 @@
	* (page reclamation) scan, then increase the level
	* and scan again now. Otherwise, sleep a bit and
	* try again later.
	+ * LM: per discussions with the numa team, don't
	+ * sleep if we have at least 2 cpus, just keep
	+ * scanning. This makes a HUGE difference when
	+ * the system is thrashing on memory, it's the
	+ * difference between usable and borked.
	*/
	mtx_unlock(&vm_page_queue_free_mtx);
	- if (pass >= 1)
	- pause("psleep", hz / VM_INACT_SCAN_RATE);
	+ if (pass >= 1) {
	+ if (mp_ncpus < 2) {
	+ pause("psleep", hz /VM_INACT_SCAN_RATE);
	+ }
	+ }
	pass++;
	} else {
	/*