D34787.diff
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	diff --git a/sys/dev/virtio/network/if_vtnet.c b/sys/dev/virtio/network/if_vtnet.c
	--- a/sys/dev/virtio/network/if_vtnet.c
	+++ b/sys/dev/virtio/network/if_vtnet.c
	@@ -4404,8 +4404,27 @@
	}

	static void
	-vtnet_debugnet_event(struct ifnet *ifp __unused, enum debugnet_ev event __unused)
	+vtnet_debugnet_event(struct ifnet *ifp, enum debugnet_ev event)
	{
	+ struct vtnet_softc *sc;
	+ static bool sw_lro_enabled = false;
	+
	+ /*
	+ * Disable software LRO, since it would require entering the network
	+ * epoch when calling vtnet_txq_eof() in vtnet_debugnet_poll().
	+ */
	+ sc = if_getsoftc(ifp);
	+ switch (event) {
	+ case DEBUGNET_START:
	+ sw_lro_enabled = (sc->vtnet_flags & VTNET_FLAG_SW_LRO) != 0;
	+ if (sw_lro_enabled)
	+ sc->vtnet_flags &= ~VTNET_FLAG_SW_LRO;
	+ break;
	+ case DEBUGNET_END:
	+ if (sw_lro_enabled)
	+ sc->vtnet_flags \|= VTNET_FLAG_SW_LRO;
	+ break;
	+ }
	}

	static int