Date: Sat, 2 Sep 2006 02:04:10 +0200 From: =?iso-8859-2?Q?Daniel_Dvo=F8=E1k?= <dandee@hellteam.net> To: <current@freebsd.org> Subject: watchdogd_flags followed by panic watchdog timeout, after reboot my rc.conf disappear Message-ID: <000001c6ce23$525f1ca0$6508280a@tocnet28.jspoj.czf>
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Hi all,
=20
first of all, I=B4m sorry maybe for my bad English.
=20
We have 2 routers which I maintain in our mesh wireless community =
network.
=20
The Router 1 has 2 atheros adapters, ath0=3Dwistron cm9, ath1=3Dwistron =
cm10, of
course some sisX, fxpX and so on.
The Router 2 has 1 atheros adapter, ath0=3Dwistron CM10.
=20
My R1 panics and even more it freezes very often. Maybe the reason for
panicing and freezing is the same and maybe not.
=20
This is not important now, this story is about R2.
=20
I started to use "option SW_WATCHDOG" in both my custom kernels on the =
R1
and R2 recently in hope, it is some walkaround for freezing at least if =
not
for panicing.
=20
In the /etc/defaults/rc.conf there are not "watchdogd_flags=3D""" =
option, but
I tried to wrote it to my /etc/rc.conf in this way:
=20
watchdogd_enable=3D"YES"
watchdogd_flags=3D"-e ping 10.40.0.72 -s 2 -t 1"
=20
I saved my rc.conf without any doubt.
=20
I did so, because I wanted to instruct watchdogd to execute my command,
common pinging some IP address. I was not satisfied with a trivial file
system check instead.
=20
After saving the rc.conf file, I restarted watchdogd deamon at once.
=20
... and ... 2 seconds ... my ssh client was disconnected ... unexpected =
end
of ssh session. :)
=20
Okay, maybe something wrong, maybe I did a mistake and it panicked.
=20
I was waitting for 3 minutes, but R2 did not react at all.
=20
So I went to R2 and I powered off and powered on ... but still it was =
the
same.
=20
After I attached monitor and keyboard, I saw that ifconfig did not =
configure
any interfaces. Why ?
=20
Answear: Because rc.conf had 0 Bytes !!!
=20
-rw-r--r-- 1 root wheel 6174 Sep 1 XX:XX rc.conf , I do not =
remember
time of last modification of file.
=20
So the content of rc.conf was completly gone !!!
=20
Is it possible at all ?
=20
Now I am scared that any modification rc.conf will be mean loss of =
content.
=20
I have kernel dump and backtrace of panic.
=20
It is in the attachment.
=20
=20
If I could help with this, I will do it.
=20
And please explain me somebody, how I lost the content of rc.conf file. =
:-O
Thank you.
=20
Daniel
=20
P.S.: I am not currently subscribed in the freebsd-stable mailling list, =
so
use my e-mail address. I am ok with freebsd-current mailling list.
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# cd /usr/obj/usr/src/sys/mykernel/
# kgdb kernel.debug /var/crash/vmcore.0
[GDB will not be able to debug user-mode threads: =
/usr/lib/libthread_db.so: Unde =
fined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you =
are
welcome to change it and/or distribute copies of it under certain =
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for =
details.
This GDB was configured as "i386-marcel-freebsd".
Unread portion of the kernel message buffer:
interrupt total
irq14: ata0 325735
irq16: fxp1 5
irq17: ath0 50298459
irq18: wi0 3904083
irq19: sis0 fxp0 20167051
cpu0: timer 604044908
Total 678740241
panic: watchdog timeout
Uptime: 3d11h53m45s
Dumping 223 MB (2 chunks)
chunk 0: 1MB (159 pages) ... ok
chunk 1: 223MB (57072 pages) 207 191 175 159 143 127 111 95 79 63 47 =
31 15
#0 doadump () at pcpu.h:165
165 __asm __volatile("movl %%fs:0,%0" : "=3Dr" (td));
(kgdb) backtrace
#0 doadump () at pcpu.h:165
#1 0xc059c4ee in boot (howto=3D260) at =
/usr/src/sys/kern/kern_shutdown.c:402
#2 0xc059c7a6 in panic (fmt=3D0xc081050d "watchdog timeout")
at /usr/src/sys/kern/kern_shutdown.c:558
#3 0xc0571642 in watchdog_fire () at /usr/src/sys/kern/kern_clock.c:583
#4 0xc0571130 in hardclock (frame=3D0xc1f44780)
at /usr/src/sys/kern/kern_clock.c:279
#5 0xc07a4631 in lapic_handle_timer (frame=3D
{cf_vec =3D 0, cf_fs =3D 8, cf_es =3D 40, cf_ds =3D 40, cf_edi =3D =
-1040320488, cf_esi =3D -1040320512, cf_ebp =3D -890192676, cf_ebx =3D =
0, cf_edx =3D 0, cf_ecx =3D -1041016416, cf_eax =3D 1000, cf_eip =3D =
-1063283195, cf_cs =3D 32, cf_eflags =3D 524818, cf_esp =3D -890192644, =
cf_ss =3D -1063305969}) at /usr/src/sys/i386/i386/local_apic.c:623
#6 0xc079eb30 in Xtimerint () at apic_vector.s:137
#7 0xc09f9605 in ?? ()
#8 0xcaf0bd04 in ?? ()
#9 0xc07a609f in cpu_idle () at /usr/src/sys/i386/i386/machdep.c:1134
Previous frame inner to this frame (corrupt stack?)
(kgdb) quit
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