Stuart Henderson wrote:
> set ddb.console=1 (needs to be done with securelevel<=0; add
> to sysctl.conf and reboot), then you can send a BREAK over the
> serial port and usually it will put you into DDB.
>
>
I set the sysctl a while ago.
It hung again today whilst I was trying to SSH an ISO to it, so I used
the ALOM card to send it a break. It didn't work. Is there anything else
I can do? I'm guessing its hardlocking, so I suppose the only thing I
can do is have something writing lots of logging.
Once I had rebooted it again, I decided to test that the ddb.console
thing was working, so I waited to get the login prompt, broke out to the
ALOM prompt, and sent a break. It worked, and dropped to ddb>
Excellent. Test successful, I figured I should try to reboot cleanly, so
I issued boot sync. Oh dear. This caused "panic: switch wchan"
Everything I have I have enclosed below.
--
Si1entDave
OpenBSD/sparc64 (slash.dotslash.org.uk) (console)
login: sc> break -c
Are you sure you want to send a break to the system [y/n]? y
Enter #. to return to ALOM.
SC Alert: SC Request to send Break to host.
kdb breakpoint at 14002c0
Stopped at Debugger+0x4: nop
ddb{0}> boot sync
syncing disks... panic: switch wchan
kdb breakpoint at 14002c0
Stopped at Debugger+0x4: nop
RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC!
IF RUNNING SMP, USE 'mach ddbcpu <#>' AND 'trace' ON OTHER PROCESSORS, TOO.
DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION!
ddb{0}> ps
PID PPID PGRP UID S FLAGS WAIT COMMAND
24640 1 24640 0 3 0x2004082 ttyin getty
19568 1 19568 0 3 0x2000080 select cron
17158 1 17158 0 3 0x2000080 select sshd
20330 6946 6946 67 3 0x2000180 netcon httpd
5624 6946 6946 67 3 0x2000180 netcon httpd
12876 6946 6946 67 3 0x2000180 netcon httpd
17194 6946 6946 67 3 0x2000180 netcon httpd
3908 6946 6946 67 3 0x2000180 netcon httpd
25437 1 25437 0 3 0x2000180 select inetd
*22743 1 22743 0 3 0x2040180 select sendmail
6946 1 6946 67 3 0x2000180 select httpd
19349 13288 748 83 3 0x2000180 poll ntpd
13288 748 748 83 3 0x2000180 poll ntpd
748 1 748 0 3 0x2000080 poll ntpd
1234 27316 27316 73 3 0x2000100 ffs_fsync syslogd
27316 1 27316 0 3 0x2000088 netio syslogd
42 0 0 0 3 0x2100200 bored crypto
41 0 0 0 3 0x2100200 aiodoned aiodoned
40 0 0 0 3 0x2100200 syncer update
39 0 0 0 3 0x2100200 cleaner cleaner
38 0 0 0 3 0x100200 reaper reaper
37 0 0 0 3 0x2100200 pgdaemon pagedaemon
36 0 0 0 3 0x2100200 pftm pfpurge
35 0 0 0 7 0x100200 idle31
34 0 0 0 7 0x100200 idle30
33 0 0 0 7 0x100200 idle29
32 0 0 0 7 0x100200 idle28
31 0 0 0 7 0x100200 idle27
30 0 0 0 7 0x100200 idle26
29 0 0 0 7 0x100200 idle25
28 0 0 0 7 0x100200 idle24
27 0 0 0 7 0x100200 idle23
26 0 0 0 7 0x100200 idle22
25 0 0 0 7 0x100200 idle21
24 0 0 0 7 0x100200 idle20
23 0 0 0 7 0x100200 idle19
22 0 0 0 7 0x100200 idle18
21 0 0 0 7 0x100200 idle17
20 0 0 0 7 0x100200 idle16
19 0 0 0 7 0x100200 idle15
18 0 0 0 7 0x100200 idle14
17 0 0 0 7 0x100200 idle13
16 0 0 0 7 0x100200 idle12
15 0 0 0 7 0x100200 idle11
14 0 0 0 7 0x100200 idle10
13 0 0 0 7 0x100200 idle9
12 0 0 0 7 0x100200 idle8
11 0 0 0 7 0x100200 idle7
10 0 0 0 7 0x100200 idle6
9 0 0 0 7 0x100200 idle5
8 0 0 0 7 0x100200 idle4
7 0 0 0 7 0x100200 idle3
6 0 0 0 7 0x100200 idle2
5 0 0 0 7 0x100200 idle1
4 0 0 0 3 0x2100200 bored syswq
3 0 0 0 2 0x100200 getblk idle0
2 0 0 0 3 0x2100200 kmalloc kmthread
1 0 1 0 3 0x2004080 wait init
0 -1 0 0 3 0x2080200 scheduler swapper
ddb{0}> trace
copyout(4001bbf7470, 4001bc24480, 118, 149b800, 4008501bce0, 4) at
copyout+0x21
0
mi_switch(1400, 118, 4008501bb90, 1f5, 1802000, 5) at mi_switch+0x168
sleep_finish(4008501bb90, 1, 118, 149b800, 4008501bce0, 4) at
sleep_finish+0x12
0
tsleep(1890160, 118, 4008501bb90, 1f5, 1802000, 5) at tsleep+0xa0
sys_select(0, 4008501bdd0, 4008501bdc0, 0, 4008501bce0, 4) at
sys_select+0x1dc
syscall(4008501bed0, 5d, 44db85e8, 44db85ec, 0, 0) at syscall+0x13c
softtrap(8, fffffffffffceb30, 0, 0, fffffffffffceb20, fffffffffffcda10)
at soft
trap+0x18c
ddb{0}> boot sync
rebooting
SC Alert: Host System has Reset
