Date: Fri, 19 Jun 2009 13:50:03 GMT From: Adam K Kirchhoff <adamk@voicenet.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/135692: [mtx] [witness] blockable sleep lock - kernel panic on 8.0-CURRENT Message-ID: <200906191350.n5JDo3Hg012946@freefall.freebsd.org>
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The following reply was made to PR kern/135692; it has been noted by GNATS.
From: Adam K Kirchhoff <adamk@voicenet.com>
To: bug-followup@FreeBSD.org, adamk@voicenet.com
Cc:
Subject: Re: kern/135692: [mtx] [witness] blockable sleep lock - kernel panic
on 8.0-CURRENT
Date: Fri, 19 Jun 2009 09:30:46 -0400
asf -ks `sysctl -n kern.module_path` kernel.asf
worked without any errors. It created /root/kernel.asf:
[ root@sorrow - ~ ]: ls -l /root/kernel.asf
-rw-r--r-- 1 root wheel 1067 Jun 18 17:13 /root/kernel.asf
But when I try to add it in kgdb, this is what I get:
(kgdb) add-symbol-file /root/kernel.asf
add symbol table from file "/root/kernel.asf" at
(y or n) y
"/root/kernel.asf": can't read symbols: File format not recognized.
However, I got the gist of things and simply copied and pasted each line
of the kernel.asf file into kgdb. It adds the symbols for each module
without any errors. 'bt full' however, only returns a few lines:
Here's the full output from kgdb:
[ root@sorrow - ~ ]: kgdb /boot/kernel/kernel /var/crash/vmcore.7
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:
panic: blockable sleep lock (sleep mutex) 32 @
/usr/src/sys/vm/uma_core.c:1990
cpuid = 2
KDB: enter: panic
Uptime: 1h57m3s
Physical memory: 2029 MB
Dumping 252 MB: 237 221 205 189 173 157 141 125 109 93 77 61 45 29 13
Reading symbols from /boot/kernel/linux.ko...Reading symbols from
/boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/snd_hda.ko...Reading symbols from
/boot/kernel/snd_hda.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/snd_hda.ko
Reading symbols from /boot/kernel/sound.ko...Reading symbols from
/boot/kernel/sound.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/sound.ko
Reading symbols from /boot/kernel/accf_http.ko...Reading symbols from
/boot/kernel/accf_http.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/accf_http.ko
Reading symbols from /boot/kernel/aio.ko...Reading symbols from
/boot/kernel/aio.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/aio.ko
Reading symbols from /boot/modules/kqemu.ko...done.
Loaded symbols for /boot/modules/kqemu.ko
Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from
/boot/kernel/linprocfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linprocfs.ko
Reading symbols from /boot/kernel/smbfs.ko...Reading symbols from
/boot/kernel/smbfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/smbfs.ko
Reading symbols from /boot/kernel/libiconv.ko...Reading symbols from
/boot/kernel/libiconv.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/libiconv.ko
Reading symbols from /boot/kernel/libmchain.ko...Reading symbols from
/boot/kernel/libmchain.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/libmchain.ko
Reading symbols from /boot/kernel/radeon.ko...Reading symbols from
/boot/kernel/radeon.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/radeon.ko
Reading symbols from /boot/kernel/drm.ko...Reading symbols from
/boot/kernel/drm.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/drm.ko
Reading symbols from /boot/modules/vboxdrv.ko...done.
Loaded symbols for /boot/modules/vboxdrv.ko
#0 doadump () at pcpu.h:246
246 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) add-symbol-file /boot/kernel/linux.ko.symbols 0xc10f2a90 -s .data
0xc110c000 -s .bss 0xc110ed54
add symbol table from file "/boot/kernel/linux.ko.symbols" at
.text_addr = 0xc10f2a90
.data_addr = 0xc110c000
.bss_addr = 0xc110ed54
(y or n) y
Reading symbols from /boot/kernel/linux.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/snd_hda.ko.symbols 0xc111c740 -s
.data 0xc112fb20 -s .bss 0xc112ff3c
add symbol table from file "/boot/kernel/snd_hda.ko.symbols" at
.text_addr = 0xc111c740
.data_addr = 0xc112fb20
.bss_addr = 0xc112ff3c
(y or n) y
Reading symbols from /boot/kernel/snd_hda.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/sound.ko.symbols 0xc1148fb0 -s .data
0xc117f000 -s .bss 0xc1189a20
add symbol table from file "/boot/kernel/sound.ko.symbols" at
.text_addr = 0xc1148fb0
.data_addr = 0xc117f000
.bss_addr = 0xc1189a20
(y or n) y
Reading symbols from /boot/kernel/sound.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/accf_http.ko.symbols 0xc11956b0 -s
.data 0xc1196ca0 -s .bss 0xc1196e24
add symbol table from file "/boot/kernel/accf_http.ko.symbols" at
.text_addr = 0xc11956b0
.data_addr = 0xc1196ca0
.bss_addr = 0xc1196e24
(y or n) y
Reading symbols from /boot/kernel/accf_http.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/linprocfs.ko.symbols 0xc5c9d9f0 -s
.data 0xc5ca2480 -s .bss 0xc5ca2740
add symbol table from file "/boot/kernel/linprocfs.ko.symbols" at
.text_addr = 0xc5c9d9f0
.data_addr = 0xc5ca2480
.bss_addr = 0xc5ca2740
(y or n) y
Reading symbols from /boot/kernel/linprocfs.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/smbfs.ko.symbols 0xc5e9d170 -s .data
0xc5eb43c0 -s .bss 0xc5eb4de0
add symbol table from file "/boot/kernel/smbfs.ko.symbols" at
.text_addr = 0xc5e9d170
.data_addr = 0xc5eb43c0
.bss_addr = 0xc5eb4de0
(y or n) y
Reading symbols from /boot/kernel/smbfs.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/libiconv.ko.symbols 0xc5eb6250 -s
.data 0xc5eb87e0 -s .bss 0xc5eb8c4c
add symbol table from file "/boot/kernel/libiconv.ko.symbols" at
.text_addr = 0xc5eb6250
.data_addr = 0xc5eb87e0
.bss_addr = 0xc5eb8c4c
(y or n) y
Reading symbols from /boot/kernel/libiconv.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/libmchain.ko.symbols 0xc5f3c640 -s
.data 0xc5f3e410 -s .bss 0xc5f3e4a8
add symbol table from file "/boot/kernel/libmchain.ko.symbols" at
.text_addr = 0xc5f3c640
.data_addr = 0xc5f3e410
.bss_addr = 0xc5f3e4a8
(y or n) y
Reading symbols from /boot/kernel/libmchain.ko.symbols...done.
(kgdb) add-symbol-file /boot/modules/vboxdrv.ko 0xc6072b30 -s .data
0xc608d000 -s .bss 0xc608eb00
add symbol table from file "/boot/modules/vboxdrv.ko" at
.text_addr = 0xc6072b30
.data_addr = 0xc608d000
.bss_addr = 0xc608eb00
(y or n) y
Reading symbols from /boot/modules/vboxdrv.ko...done.
(kgdb) add-symbol-file /boot/kernel/radeon.ko.symbols 0xc6563b60 -s
.data 0xc65b6440 -s .bss 0xc65b7d20
add symbol table from file "/boot/kernel/radeon.ko.symbols" at
.text_addr = 0xc6563b60
.data_addr = 0xc65b6440
.bss_addr = 0xc65b7d20
(y or n) y
Reading symbols from /boot/kernel/radeon.ko.symbols...done.
(kgdb) add-symbol-file /boot/kernel/drm.ko.symbols 0xc65c08b0 -s .data
0xc65ce580 -s .bss 0xc65cf6a4
add symbol table from file "/boot/kernel/drm.ko.symbols" at
.text_addr = 0xc65c08b0
.data_addr = 0xc65ce580
.bss_addr = 0xc65cf6a4
(y or n) y
Reading symbols from /boot/kernel/drm.ko.symbols...done.
(kgdb) bt full
#0 doadump () at pcpu.h:246
No locals.
#1 0xc0870a8e in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:419
_giantcnt = Variable "_giantcnt" is not available.
So 'bt full' only gives me the giantcnt error. Just a regular 'bt'
gives me the same output I posted in my pr.
Am I doing something wrong?
I can possibly try a -CURRENT kernel without invariants in the next day
or two, if you think that will make a difference, or just want to
confirm your thought.
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