D26426.id77796.diff
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D26426.id77796.diff
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	Index: head/sys/vm/uma_core.c
	===================================================================
	--- head/sys/vm/uma_core.c
	+++ head/sys/vm/uma_core.c
	@@ -733,7 +733,15 @@
	zone_domain_imax_set(zdom, zdom->uzd_nitems);
	if (STAILQ_EMPTY(&zdom->uzd_buckets))
	zdom->uzd_seq = bucket->ub_seq;
	- STAILQ_INSERT_TAIL(&zdom->uzd_buckets, bucket, ub_link);
	+
	+ /*
	+ * Try to promote reuse of recently used items. For items
	+ * protected by SMR, try to defer reuse to minimize polling.
	+ */
	+ if (bucket->ub_seq == SMR_SEQ_INVALID)
	+ STAILQ_INSERT_HEAD(&zdom->uzd_buckets, bucket, ub_link);
	+ else
	+ STAILQ_INSERT_TAIL(&zdom->uzd_buckets, bucket, ub_link);
	ZDOM_UNLOCK(zdom);
	return;
	}