Index: head/sys/vm/vm_glue.c
===================================================================
--- head/sys/vm/vm_glue.c
+++ head/sys/vm/vm_glue.c
@@ -68,6 +68,7 @@
 
 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/domainset.h>
 #include <sys/limits.h>
 #include <sys/lock.h>
 #include <sys/malloc.h>
@@ -298,7 +299,7 @@
 
 struct kstack_cache_entry *kstack_cache;
 static int kstack_cache_size = 128;
-static int kstacks;
+static int kstacks, kstack_domain_iter;
 static struct mtx kstack_cache_mtx;
 MTX_SYSINIT(kstack_cache, &kstack_cache_mtx, "kstkch", MTX_DEF);
 
@@ -367,6 +368,17 @@
 		printf("vm_thread_new: kstack allocation failed\n");
 		vm_object_deallocate(ksobj);
 		return (0);
+	}
+
+	/*
+	 * Ensure that kstack objects can draw pages from any memory
+	 * domain.  Otherwise a local memory shortage can block a process
+	 * swap-in.
+	 */
+	if (vm_ndomains > 1) {
+		ksobj->domain.dr_policy = DOMAINSET_RR();
+		ksobj->domain.dr_iter = atomic_fetchadd_int(&kstack_domain_iter,
+		    1);
 	}
 
 	atomic_add_int(&kstacks, 1);
Index: head/sys/vm/vm_swapout.c
===================================================================
--- head/sys/vm/vm_swapout.c
+++ head/sys/vm/vm_swapout.c
@@ -742,7 +742,8 @@
 /*
  * Limit swapper to swap in one non-WKILLED process in MAXSLP/2
  * interval, assuming that there is:
- * - no memory shortage;
+ * - there exists at least one domain that is not suffering from a shortage of
+ *   free memory;
  * - no parallel swap-ins;
  * - no other swap-ins in the current SWAPIN_INTERVAL.
  */
@@ -750,7 +751,7 @@
 swapper_wkilled_only(void)
 {
 
-	return (vm_page_count_min() || swap_inprogress > 0 ||
+	return (vm_page_count_min_set(&all_domains) || swap_inprogress > 0 ||
 	    (u_int)(ticks - last_swapin) < SWAPIN_INTERVAL);
 }