Brad Smith <brad <at> comstyle.com> writes:
>
> Index: if_em.c
> ===================================================================
> RCS file: /home/cvs/src/sys/dev/pci/if_em.c,v
> retrieving revision 1.295
> diff -u -p -u -p -r1.295 if_em.c
> --- if_em.c 11 Feb 2015 23:21:47 -0000 1.295
> +++ if_em.c 3 May 2015 11:17:49 -0000
> <at> <at> -2597,6 +2597,7 <at> <at> int
> em_setup_receive_structures(struct em_softc *sc)
> {
> struct ifnet *ifp = &sc->interface_data.ac_if;
> + u_int lwm;
>
> memset(sc->rx_desc_base, 0,
> sizeof(struct em_rx_desc) * sc->num_rx_desc);
> <at> <at> -2608,8 +2609,12 <at> <at>
em_setup_receive_structures(struct em_so
> sc->next_rx_desc_to_check = 0;
> sc->last_rx_desc_filled = sc->num_rx_desc - 1;
>
> - if_rxr_init(&sc->rx_ring, 2 * ((ifp->if_hardmtu / MCLBYTES) + 1),
> - sc->num_rx_desc);
> + if (sc->hw.max_frame_size == ETHER_MAX_LEN)
> + lwm = 4;
> + else
> + lwm = 2 * ((ifp->if_hardmtu / MCLBYTES) + 1);
> +
> + if_rxr_init(&sc->rx_ring, lwm, sc->num_rx_desc);
>
> if (em_rxfill(sc) == 0) {
> printf("%s: unable to fill any rx descriptors\n",
>
Running with this patch applied
$ uptime
3:17PM up 5 days, 2:04, 4 users, load averages: 0.68, 0.38, 0.20
without the need to restart the network. This wouldn't have been possible
without the patch.
Regards,
--
Christian
