On Wed, Jan 14, 2026 at 09:29:41AM +0000, Alisdair MacLeod wrote:
>
>
> > On 14 Jan 2026, at 09:23, David Gwynne <[email protected]> wrote:
> >
> > can you tell if these Ofails are drops or errors by adding -e and -d to
> > the netstat command?
>
> It looks like they are all drops:
cool.
> # netstat -edI aq0
> Name Mtu Network Address Ipkts Idrop Opkts Odrop
> Colls
> aq0 1500 <Link> 00:e2:59:01:7e:35 0 0 93799 7471 > 0
>
> > kstat aq0::: would also be interesting.
>
> aq0:0:rxq:0
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:rxq:1
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:rxq:2
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:rxq:3
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:rxq:4
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:rxq:5
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:rxq:6
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:rxq:7
> packets: 0 packets
> bytes: 0 bytes
> fdrops: 0 packets
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> enqueues: 0
> dequeues: 0
> aq0:0:txq:0
> packets: 8085 packets
> bytes: 1172790 bytes
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> maxqlen: 2048 packets
> oactive: false
> oactives: 0
> aq0:0:txq:1
> packets: 14619 packets
> bytes: 4416234 bytes
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> maxqlen: 2048 packets
> oactive: false
> oactives: 0
> aq0:0:txq:2
> packets: 4076 packets
> bytes: 735756 bytes
> qdrops: 285 packets
> errors: 0 packets
> qlen: 2048 packets
looks like i found some of the missing mbufs. there's 2048 packets
stuck in this transmit queue.
> maxqlen: 2048 packets
> oactive: true
> oactives: 1
> aq0:0:txq:3
> packets: 12637 packets
> bytes: 4088727 bytes
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> maxqlen: 2048 packets
> oactive: false
> oactives: 0
> aq0:0:txq:4
> packets: 4082 packets
> bytes: 1139174 bytes
> qdrops: 4405 packets
> errors: 0 packets
> qlen: 2048 packets
and here.
> maxqlen: 2048 packets
> oactive: true
> oactives: 1
> aq0:0:txq:5
> packets: 4089 packets
> bytes: 1182857 bytes
> qdrops: 2781 packets
> errors: 0 packets
> qlen: 2048 packets
and here.
> maxqlen: 2048 packets
> oactive: true
> oactives: 1
> aq0:0:txq:6
> packets: 3556 packets
> bytes: 286831 bytes
> qdrops: 0 packets
> errors: 0 packets
> qlen: 1539 packets
this one is accumulating mbufs.
> maxqlen: 2048 packets
> oactive: true
> oactives: 1
> aq0:0:txq:7
> packets: 42655 packets
> bytes: 11614149 bytes
> qdrops: 0 packets
> errors: 0 packets
> qlen: 0 packets
> maxqlen: 2048 packets
> oactive: false
> oactives: 0
>
> We are now somewhat beyond the limits of my understanding but
> I will try to recreate the previous error I had with aq0 in
> the hope that is also useful.
my guess is the aq hardware wont do anything with the packets it's been
asked to transmit while the link is down. a simple fix is to check the
link state in the transmit path.
Index: if_aq_pci.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_aq_pci.c,v
diff -u -p -r1.33 if_aq_pci.c
--- if_aq_pci.c 11 Nov 2025 17:43:18 -0000 1.33
+++ if_aq_pci.c 14 Jan 2026 09:37:58 -0000
@@ -3262,6 +3262,11 @@ aq_start(struct ifqueue *ifq)
uint32_t idx, free, used, ctl1, ctl2;
int error, i;
+ if (!LINK_STATE_IS_UP(sc->sc_arpcom.ac_if.if_link_state)) {
+ ifq_purge(ifq);
+ return;
+ }
+
idx = tx->tx_prod;
free = tx->tx_cons + AQ_TXD_NUM - tx->tx_prod;
used = 0;
