NetBSD Problem Report #57694

From wiz@exadelic.gatalith.at  Sun Nov 12 19:43:35 2023
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Message-Id: <20231112194328.DE6C92EBBAD3@exadelic.gatalith.at>
Date: Sun, 12 Nov 2023 20:43:28 +0100 (CET)
From: Thomas Klausner <wiz@NetBSD.org>
Reply-To: Thomas Klausner <wiz@NetBSD.org>
To: gnats-bugs@NetBSD.org
Subject: rge(4) hang
X-Send-Pr-Version: 3.95

>Number:         57694
>Category:       kern
>Synopsis:       rge(4) hang
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Nov 12 19:45:00 +0000 2023
>Closed-Date:    
>Last-Modified:  Tue Jan 02 16:10:01 +0000 2024
>Originator:     Thomas Klausner
>Release:        NetBSD 10.99.10
>Organization:

>Environment:


Architecture: x86_64
Machine: amd64
>Description:
After the latest fixes, rge(4) is better, but it's completely hung up
the network interface twice so far - no network traffic possible on it
- both times so hard, that the BIOS had some kind of issue on the next
boot and needed 15 minutes to sort itself out (before even showing
anything on the screen).

I'm running a kernel from Oct 22.

That's in 1Gb mode.

dmesg:
rge0 at pci7 dev 0 function 0: Realtek Semiconductor 8125 10/100/1G/2.5G Ethernet (rev. 0x05)
rge0: interrupting at msix1 vec 0
rge0: Ethernet address xx.xx.xx.xx.xx.xx


In /var/log/messages I see:
Nov  1 18:59:43 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 18:59:43 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 18:59:45 exadelic dhcpcd[2191]: rge0: Router Advertisement from xxxx::1  1 18:59:46 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 18:59:46 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 18:59:58 exadelic dhcpcd[2191]: rge0: no IPv6 Routers available
Nov  1 19:01:11 exadelic dhcpcd[2191]: rge0: xxxx::1 is reachable again
Nov  1 19:01:19 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 19:01:19 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 19:01:31 exadelic dhcpcd[2191]: rge0: no IPv6 Routers available
Nov  1 19:01:57 exadelic dhcpcd[2191]: rge0: xxxx::1 is reachable again
Nov  1 19:02:05 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 19:02:05 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 19:02:17 exadelic dhcpcd[2191]: rge0: no IPv6 Routers available
Nov  1 19:04:27 exadelic dhcpcd[2191]: rge0: xxxx::1 is reachable again
Nov  1 19:04:35 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 19:04:35 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 19:04:47 exadelic dhcpcd[2191]: rge0: no IPv6 Routers available
Nov  1 19:06:12 exadelic dhcpcd[2191]: rge0: xxxx::1 is reachable again
Nov  1 19:06:20 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 19:06:21 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 19:06:33 exadelic dhcpcd[2191]: rge0: no IPv6 Routers available
Nov  1 19:09:27 exadelic /netbsd: [ 91537.5847758] nfs server 192.168.178.19:/path: not responding
Nov  1 19:15:16 exadelic dhcpcd[2191]: rge0: xxxx::1 is reachable again
Nov  1 19:15:24 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 19:15:24 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 19:15:36 exadelic dhcpcd[2191]: rge0: no IPv6 Routers available
Nov  1 19:16:51 exadelic dhcpcd[2191]: rge0: xxxx::1 is reachable again
Nov  1 19:16:52 exadelic dhcpcd[2191]: ps_root_recvmsg: No buffer space available
Nov  1 19:16:52 exadelic dhcpcd[2191]: ps_root_recvmsg: No buffer space available
Nov  1 19:16:59 exadelic dhcpcd[2191]: rge0: xxxx::1 is unreachable
Nov  1 19:16:59 exadelic dhcpcd[2191]: rge0: soliciting an IPv6 router
Nov  1 19:16:59 exadelic dhcpcd[2191]: ps_root_recvmsg: No buffer space available
Nov  1 19:17:11 exadelic syslogd[2290]: last message repeated 3 times
Nov  1 19:17:11 exadelic dhcpcd[2191]: rge0: no IPv6 Routers available
Nov  1 19:17:44 exadelic dhcpcd[2191]: ps_root_recvmsg: No buffer space available

Just in case it matters, I'm not running with default sysctl's, I have

kern.sbmax: 262144 -> 16777216
net.inet.tcp.recvbuf_max: 262144 -> 16777216
net.inet.tcp.sendbuf_max: 262144 -> 16777216
net.inet.tcp.recvspace: 32768 -> 262144
net.inet.tcp.sendspace: 32768 -> 262144

because of

https://mail-index.netbsd.org/current-users/2017/09/21/msg032369.html
>How-To-Repeat:
Make heavy use of an rge(4) device with NFS + SFTP.
>Fix:
Yes, please.

>Release-Note:

>Audit-Trail:
From: Michael van Elst <mlelstv@serpens.de>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/57694: rge(4) hang
Date: Sat, 16 Dec 2023 13:38:25 +0100

 The following patch helped here:

 --- sys/dev/pci/if_rge.c        19 Oct 2023 23:43:40 -0000      1.28
 +++ sys/dev/pci/if_rge.c        16 Dec 2023 12:33:04 -0000
 @@ -1404,24 +1404,14 @@ rge_txeof(struct rge_softc *sc)

         sc->rge_ldata.rge_txq_considx = cons;

 -#if 0
 -       if (ifq_is_oactive(&ifp->if_snd))
 -               ifq_restart(&ifp->if_snd);
 -       else if (free == 2)
 -               ifq_serialize(&ifp->if_snd, &sc->sc_task);
 -       else
 -               ifp->if_timer = 0;
 -#else
 -#if 0
 +       if (free == 2)
 +               rge_txstart(&sc->sc_task, sc);
 +
 +       CLR(ifp->if_flags, IFF_OACTIVE);
         if (!IF_IS_EMPTY(&ifp->if_snd))
                 rge_start(ifp);
         else
 -       if (free == 2)
 -               if (0) { rge_txstart(&sc->sc_task, sc); }
 -       else
 -#endif
                 ifp->if_timer = 0;
 -#endif

         return (1);
  }


 -- 
                                 Michael van Elst
 Internet: mlelstv@serpens.de
                                 "A potential Snark may lurk in every tree."

From: "Michael van Elst" <mlelstv@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/57694 CVS commit: src/sys/dev/pci
Date: Sat, 16 Dec 2023 16:35:49 +0000

 Module Name:	src
 Committed By:	mlelstv
 Date:		Sat Dec 16 16:35:49 UTC 2023

 Modified Files:
 	src/sys/dev/pci: if_rge.c

 Log Message:
 - handle stuck transmitter (descriptor still owned)
 - restart send queue after transmit
 - count output packets
 - use deferred start

 Should fix PR 57694


 To generate a diff of this commit:
 cvs rdiff -u -r1.28 -r1.29 src/sys/dev/pci/if_rge.c

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

State-Changed-From-To: open->closed
State-Changed-By: wiz@NetBSD.org
State-Changed-When: Sun, 31 Dec 2023 10:03:34 +0000
State-Changed-Why:
mlelstv's commit improved the situation a lot - I saw no more hangs
running the new kernel for over a week.


From: Thomas Klausner <wiz@NetBSD.org>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/57694: rge(4) hang
Date: Sun, 31 Dec 2023 11:02:24 +0100

 After running with rge(4) with mlelstv's change for more than a week,
 there were no problems. So this has improved stability a lot.

 Thank you, Michael!
  Thomas

State-Changed-From-To: closed->open
State-Changed-By: wiz@NetBSD.org
State-Changed-When: Tue, 02 Jan 2024 16:03:24 +0000
State-Changed-Why:
Not solved yet.


From: Thomas Klausner <wiz@NetBSD.org>
To: gnats-bugs@netbsd.org
Cc: Michael van Elst <mlelstv@serpens.de>
Subject: Re: kern/57694 (rge(4) hang)
Date: Tue, 2 Jan 2024 17:08:45 +0100

 Today the machine's network hung again, after about 10 days of uptime.

 In syslog I saw:

 Jan  2 16:34:27 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:34:27 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:34:31 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:34:39 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:34:39 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:34:42 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:34:47 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:34:50 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:34:51 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:34:51 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:34:53 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:34:55 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:34:55 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:01 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:35:02 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:35:02 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:05 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:35:06 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:06 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:13 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:35:14 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:35:14 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:17 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:35:18 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:18 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:25 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:35:26 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:35:26 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:29 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:35:30 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:30 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:37 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:35:37 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:35:37 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:41 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:35:41 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:41 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:49 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:35:49 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:35:49 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:49 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:53 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:35:57 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:35:57 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:01 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:36:01 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:36:02 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:36:02 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:04 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:36:06 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:06 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:12 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:36:13 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:36:13 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:16 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:36:17 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:17 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:24 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:36:24 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:36:24 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:24 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:30 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:36:32 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:32 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:36 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:36:38 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:36:39 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:36:39 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:36:51 exadelic syslogd[2503]: last message repeated 3 times
 Jan  2 16:36:51 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:36:54 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:37:02 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:37:03 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:37:03 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:05 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:37:07 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:07 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:13 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:37:13 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:37:13 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:16 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:37:17 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:17 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:24 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:37:25 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:37:25 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:25 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:30 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:37:33 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:33 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:37 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:37:38 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:37:39 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:37:39 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:42 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:37:43 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:43 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:37:50 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:37:50 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:37:50 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:38:02 exadelic syslogd[2503]: last message repeated 3 times
 Jan  2 16:38:02 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:38:15 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:38:15 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:38:23 exadelic syslogd[2503]: last message repeated 2 times
 Jan  2 16:38:23 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:38:23 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:38:23 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:38:35 exadelic syslogd[2503]: last message repeated 3 times
 Jan  2 16:38:35 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:38:45 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:38:53 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:38:53 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:38:53 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:39:05 exadelic syslogd[2503]: last message repeated 3 times
 Jan  2 16:39:05 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:39:39 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:39:47 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:39:47 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:39:47 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:39:50 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:39:51 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:39:51 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:39:58 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:39:58 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:39:58 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:39:58 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:40:03 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:40:06 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:40:06 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:40:10 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:40:11 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:40:12 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:40:12 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:40:12 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:40:19 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is reachable again
 Jan  2 16:40:20 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:40:20 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available
 Jan  2 16:40:24 exadelic dhcpcd[1790]: rge0: no IPv6 Routers available
 Jan  2 16:40:27 exadelic dhcpcd[1790]: rge0: fe80::de15:c8ff:fe36:2e98 is unreachable
 Jan  2 16:40:28 exadelic dhcpcd[1790]: rge0: soliciting an IPv6 router
 Jan  2 16:40:28 exadelic dhcpcd[1790]: ps_root_recvmsg: No buffer space available

 This was during a high load situation (bulk build). The machine
 stopped being accessible from the network.
  Thomas

>Unformatted:

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