Index: sys/kern/kern_sendfile.c
===================================================================
--- sys/kern/kern_sendfile.c
+++ sys/kern/kern_sendfile.c
@@ -52,6 +52,8 @@
 #include <sys/vnode.h>
 
 #include <net/vnet.h>
+#include <netinet/in.h>
+#include <netinet/in_pcb.h>
 
 #include <security/audit/audit.h>
 #include <security/mac/mac_framework.h>
@@ -545,6 +547,7 @@
 	struct shmfd *shmfd;
 	struct sendfile_sync *sfs;
 	struct vattr va;
+	struct inpcb *inp;
 	off_t off, sbytes, rem, obj_size;
 	int error, softerr, bsize, hdrlen;
 
@@ -742,6 +745,22 @@
 		refcount_init(&sfio->nios, 1);
 		sfio->so = so;
 		sfio->error = 0;
+		/*
+		 * If the network connection is associated with a NUMA
+		 * domain, and if the user has requested the data be
+		 * quickly freed, then allocate backing pages from the
+		 * domain which is local to the network connection.
+		 */
+		if ((flags & SF_NOCACHE) != 0 &&
+		    (inp = sotoinpcb(so)) != NULL &&
+		    inp->inp_numa_domain != M_NODOM &&
+		    obj->domain.dr_policy == NULL) {
+			VM_OBJECT_WLOCK(obj);
+			if (obj->domain.dr_policy == NULL)
+				obj->domain.dr_policy =
+				    DOMAINSET_PREF(inp->inp_numa_domain);
+			VM_OBJECT_WUNLOCK(obj);
+		}
 
 		nios = sendfile_swapin(obj, sfio, off, space, npages, rhpages,
 		    flags);