Daniel Li wrote:
It seems the problem is not one with guest dump, but the version of SLES.
After upgrading my NATIVE SLES 9 system to SP 3, exactly the same
problem happened while trying to use 'crash' on the live system, with a
debug linux kernel ('vmlinux.dbg' below) built on the same system from
matching 'kernel-source' package. (During this upgrade, the linux kernel
changed from 2.6.5-7.97-smp to 2.6.5-7.244-smp, the same as that on the
guest.)
Has anyone else seen this?
Did anything change in the task_struct between 2.6.5-7.97-smp and
2.6.5-7.244-smp?
Or, more likely, anything associated with the pidhash/pid_hash-related
code in the kernel?
Is the output of the crash command "help -t | grep refresh_task_table"
different when running against 2.6.5-7.97-smp vs. 2.6.5-7.244-smp?
Dave
tst037:/boot # ./crash vmlinux-2.6.5-7.244-smp vmlinux.dbg /dev/mem
crash 4.0-4.6
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Copyright (C) 2005 NEC Corporation
Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
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This GDB was configured as "x86_64-unknown-linux-gnu"...
WARNING: could not find MAGIC_START!
KERNEL: vmlinux-2.6.5-7.244-smp
DEBUG KERNEL: vmlinux.dbg (2.6.5-7.244-default)
DUMPFILE: /dev/mem
CPUS: 4
DATE: Tue Aug 28 10:57:37 2007
UPTIME: 213503982284 days, 23:42:22
LOAD AVERAGE: 0.00, 0.01, 0.22
TASKS: 104
NODENAME: tst037
RELEASE: 2.6.5-7.244-smp
VERSION: #1 SMP Mon Dec 12 18:32:25 UTC 2005
MACHINE: x86_64 (2793 Mhz)
MEMORY: 1015808 GB
PID: 14432
COMMAND: "crash"
TASK: 1012fbb0db8 [THREAD_INFO: 5]
CPU: 3
STATE: (unknown)
crash> bt
PID: 14432 TASK: 1012fbb0db8 CPU: 3 COMMAND: "crash"
(active)
crash> ps
PID PPID CPU TASK ST %MEM VSZ RSS COMM
> 0 0 0 ffffffff803d2800 RU 0.0 4398751044160
4389851194656 [200^L]
> 0 -1 1 10037e1e9a0 RU 0.0 4398425096768
8800221827680 [200^L]
> 0 -1 2 10037e1e080 RU 0.0 4398425096768
8800221827680 [200^L]
0 -1 3 100bff6b2d0 RU 0.0 4398425096768
8800221827680 [200^L]
0 0 3 ffffffff803d2808 ?? 0.0 0 0 [swapper]
1 0 3 10037e1f2c8 ?? 0.0 640 320 init
2 -1 3 100bff6a9b8 ?? 0.0 0 0 [migration/0]
3 -1 3 100bff6a098 ?? 0.0 0 0 [ksoftirqd/0]
4 -1 3 100bfe552e8 ?? 0.0 0 0 [migration/1]
5 -1 3 100bfe549c8 ?? 0.0 0 0 [ksoftirqd/1]
6 -1 3 100bfe540a8 ?? 0.0 0 0 [migration/2]
7 -1 3 100bfe5f2f8 ?? 0.0 0 0 [ksoftirqd/2]
8 -1 3 100bfe5e9d8 ?? 0.0 0 0 [migration/3]
9 -1 3 100bfe5e0b8 ?? 0.0 0 0 [ksoftirqd/3]
10 -1 3 1000a7ef308 ?? 0.0 0 0 [events/0]
11 -1 3 1000a7ee9e8 ?? 0.0 0 0 [events/1]
12 -1 3 1000a7ee0c8 ?? 0.0 0 0 [events/2]
13 -1 3 1000a7f9318 ?? 0.0 0 0 [events/3]
14 -1 3 1000a7f89f8 ?? 0.0 0 0 [khelper]
15 -1 3 1000a7f80d8 ?? 0.0 0 0 [kacpid]
82 -1 3 10037c7f328 ?? 0.0 0 0 [kblockd/0]
83 -1 3 10037c7ea08 ?? 0.0 0 0 [kblockd/1]
84 -1 3 10037c7e0e8 ?? 0.0 0 0 [kblockd/2]
85 -1 3 10037d0d338 ?? 0.0 0 0 [kblockd/3]
110 -1 3 10037d0ca18 ?? 0.0 0 0 [pdflush]
111 -1 3 10037d5b358 ?? 0.0 0 0 [pdflush]
112 -1 3 10037d36108 ?? 0.0 0 0 [kswapd0]
113 -1 3 10037d63368 ?? 0.0 0 0 [aio/0]
114 -1 3 10037d5aa38 ?? 0.0 0 0 [aio/1]
115 -1 3 10037d62a48 ?? 0.0 0 0 [aio/2]
116 -1 3 10037d5a118 ?? 0.0 0 0 [aio/3]
1355 -1 3 10037dbaa68 ?? 0.0 0 0 [kseriod]
2050 -1 3 1013fde0238 ?? 0.0 0 0 [scsi_eh_0]
2224 -1 3 1013fde5488 ?? 0.0 0 0 [reiserfs/0]
2225 -1 3 1013fc2d448 ?? 0.0 0 0 [reiserfs/1]
2226 -1 3 1013fc954d8 ?? 0.0 0 0 [reiserfs/2]
2227 -1 3 10037dcc168 ?? 0.0 0 0 [reiserfs/3]
4282 -1 3 10132400a58 ?? 0.0 0 0 [khubd]
4865 -1 3 10132a2f398 ?? 0.0 2560 608 hwscand
6086 -1 3 10037dbea98 ?? 0.0 2512 692 dhcpcd
7143 -1 3 10132eb9338 ?? 0.0 2484 620 irqbalance
8276 -1 3 1012dff89e8 ?? 0.0 5716 924 syslogd
8282 -1 3 1012d1ff678 ?? 0.0 2748 1120 klogd
8340 -1 3 1012d2129c8 ?? 0.0 4580 724 portmap
8342 -1 3 1013971b2d8 ?? 0.0 21460 2336 slpd
8343 -1 3 1012dc17358 ?? 0.1 22396 3696 resmgrd
8612 -1 3 1012197f398 ?? 0.1 31732 7452 cupsd
8625 -1 3 1012f8ed3c8 ?? 0.1 30476 3176 sshd
8744 -1 3 1012dc16118 ?? 0.1 23640 3268 powersaved
8797 -1 3 1012dff80c8 ?? 0.2 99996 7952 slapd
8820 -1 3 10132a2e158 ?? 0.2 99996 7952 slapd
8982 -1 3 1012156aa48 ?? 0.2 99996 7952 slapd
9523 -1 3 1012e03e0f8 ?? 0.0 20104 2376 master
9539 -1 3 10129c60328 ?? 0.1 22640 3996 qmgr
9555 -1 3 1012d66ccf8 ?? 0.2 99996 7952 slapd
9558 -1 3 1012b6c0338 ?? 0.2 99996 7952 slapd
9656 -1 3 10132eb8a18 ?? 0.0 17884 2040 cron
9661 -1 3 1012f8ecaa8 ?? 0.1 35180 4028 nscd
9662 -1 3 1012cc595e8 ?? 0.1 35180 4028 nscd
9663 -1 3 10037dbf3b8 ?? 0.1 35180 4028 nscd
9664 -1 3 1012ebf75a8 ?? 0.1 35180 4028 nscd
9665 -1 3 10122aa6bc8 ?? 0.1 35180 4028 nscd
9666 -1 3 1013fcdd598 ?? 0.1 35180 4028 nscd
9667 -1 3 10122aa62a8 ?? 0.1 35180 4028 nscd
9773 -1 3 10129c60c48 ?? 0.0 8936 980 kdm
9780 -1 3 10122a3f3b8 ?? 0.5 40900 24864 X
9783 -1 3 1012dcdcd98 ?? 0.1 35220 3400 kdm
9832 -1 3 1013a841678 ?? 0.0 2720 768 mingetty
9833 -1 3 10037dcca88 ?? 0.0 2720 768 mingetty
9834 -1 3 1013a840d58 ?? 0.0 2720 768 mingetty
9835 -1 3 1012d66c3d8 ?? 0.0 2720 768 mingetty
9836 -1 3 1012fa8e428 ?? 0.0 2720 768 mingetty
9837 -1 3 1013fcdcc78 ?? 0.0 2720 768 mingetty
9865 -1 3 10132a2ea78 ?? 0.0 8000 1808 kde
9898 -1 3 101347db548 ?? 0.0 6288 932 gpg-agent
9899 -1 3 1012a4203f8 ?? 0.0 21196 2256 ssh-agent
9923 -1 3 10129542378 ?? 0.3 60192 13740 kdeinit
9926 -1 3 1013971a098 ?? 0.3 60972 13780 kdeinit
9928 -1 3 10132eb80f8 ?? 0.3 63436 15452 kdeinit
9931 -1 3 1012156a128 ?? 0.4 78752 21480 kdeinit
9939 -1 3 101226cf2c8 ?? 0.2 35848 8404 artsd
10009 -1 3 1012d034a08 ?? 0.5 94832 27044 kdeinit
10010 -1 3 101223d1688 ?? 0.0 2480 484 kwrapper
10012 -1 3 101226ce088 ?? 0.4 70116 20084 kdeinit
10013 -1 3 1012b8f8d88 ?? 0.4 78556 23520 kdeinit
10015 -1 3 101347dac28 ?? 0.4 70120 22384 kdeinit
10017 -1 3 101237a14f8 ?? 0.4 69476 20816 kdeinit
10019 -1 3 1012e03ea18 ?? 0.5 79308 25180 kdeinit
10021 -1 3 101295435b8 ?? 0.5 86836 25992 kdeinit
10022 -1 3 10134215378 ?? 0.3 62000 14332 kdeinit
10026 -1 3 1013fde0b58 ?? 0.4 75996 23024 kdeinit
10030 -1 3 10037dbe178 ?? 0.5 77916 26192 kdeinit
10031 -1 3 1013f34aad8 ?? 0.4 72728 22036 kpowersave
10032 -1 3 101295963e8 ?? 0.5 79788 26072 suseplugger
10033 -1 3 1013fde1478 ?? 0.4 71832 22452 susewatcher
10035 -1 3 1012156b368 ?? 0.4 75900 23428 kdeinit
10040 -1 3 1013a840438 ?? 0.5 79788 26072 suseplugger
10050 -1 3 10037dbb388 ?? 0.5 81420 25236 kdeinit
10051 -1 3 1012fbb0498 ?? 0.1 8420 2760 bash
10087 -1 3 1013f34b3f8 ?? 0.1 38132 3560 sshd
10090 -1 3 1012a421638 ?? 0.1 9324 2976 bash
10196 -1 3 1012fbb16d8 ?? 0.4 64700 19300 kdesktop_lock
14432 -1 3 1012fbb0db8 ?? 2.4 74380 125620 crash
14437 -1 3 1012d66d618 ?? 0.0 4284 1252 crash
25011 -1 3 1012b8f96a8 ?? 0.0 16920 2180 pickup
crash> bt 1012d1ff678
PID: 8282 TASK: 1012d1ff678 CPU: 3 COMMAND: "klogd"
bt: invalid kernel virtual address: 11 type: "stack contents"
bt: read of stack at 11 failed
crash> task 1012d1ff678
PID: 8282 TASK: 1012d1ff678 CPU: 3 COMMAND: "klogd"
struct task_struct {
state = 1104534274048,
thread_info = 0x11,
usage = {
counter = 320
},
flags = 0,
ptrace = 498216206335,
lock_depth = 120,
prio = 0,
static_prio = 1048832,
run_list = {
next = 0x200200,
prev = 0x0
},
array = 0x11de3f11,
sleep_avg = 6,
interactive_credit = 252089242482,
timestamp = 252089242482,
last_ran = 0,
activated = 0,
policy = 18446744073709551615,
cpus_allowed = 18446744073709551615,
time_slice = 7,
first_time_slice = 1,
tasks = {
next = 0x1012d212a58,
prev = 0x1012dff8a78
crash> q
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