Compare number of allocated clusters with a low watermark, not

a magic number 4 since sometimes we can't fit a single packet
(jumbo frame) into 4 clusters.

OK dlg

diff --git a/sys/net/if.c b/sys/net/if.c
index 3425b77..92c2d16 100644 (file)
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: if.c,v 1.298 2014/08/11 13:51:07 mpi Exp $    */
+/*     $OpenBSD: if.c,v 1.299 2014/08/14 11:38:14 mikeb Exp $  */
 /*     $NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $  */
 
 /*
@@ -2412,7 +2412,7 @@ if_rxr_adjust_cwm(struct if_rxring *rxr)
                        rxr->rxr_cwm--;
                else
                        return;
-       } else if (rxr->rxr_alive > 4)
+       } else if (rxr->rxr_alive >= rxr->rxr_lwm)
                return;
        else if (rxr->rxr_cwm < rxr->rxr_hwm)
                rxr->rxr_cwm++;