D49349.1794252410.diff
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	diff --git a/sys/vm/uma_core.c b/sys/vm/uma_core.c
	--- a/sys/vm/uma_core.c
	+++ b/sys/vm/uma_core.c
	@@ -5339,6 +5339,13 @@
	zone_foreach(uma_reclaim_domain_cb, &args);
	break;
	case UMA_RECLAIM_DRAIN_CPU:
	+ /*
	+ * Reclaim globally visible free items from all zones, then drain
	+ * per-CPU buckets, then reclaim items freed while draining.
	+ * This approach minimizes expensive context switching needed to
	+ * drain each zone's per-CPU buckets.
	+ */
	+ args.req = UMA_RECLAIM_DRAIN;
	zone_foreach(uma_reclaim_domain_cb, &args);
	pcpu_cache_drain_safe(NULL);
	zone_foreach(uma_reclaim_domain_cb, &args);