Re: [Crash-utility] kernel 3.6.10
----- Original Message -----
Hi,
I tried the latest crash tool 6.1.1 (built from sources) on a kernel
3.6.10 dump and it failed while reading the module information.
Error says:
crash: invalid structure member offset: module_core_size
FILE: kernel.c LINE: 2974 FUNCTION: module_init()
[../../crash-6.1.1/crash] error trace: 809afc6 => 810ecab => 8152543 => 80929f9
80929f9: OFFSET_verify.part.27+71
8152543: OFFSET_verify+51
810ecab: module_init+939
809afc6: main_loop+214
Even if I disable the the modules information gathering --no_modules)
it fails later on while trying to read the idle tasks:
crash: cannot determine idle task addresses from init_tasks[] or runqueues[]
crash: cannot resolve "init_task_union"
Is this a known issue? Any plans to support kernel 3.6.10?
As a FYI, I can use --minimal to enter the system and retrieve the dmesg
buffer at the crash point.
Thanks,
Pablo Sole.
The module.core_size issue is hard to understand. I'm running a 3.6.10-2.fc17
kernel,
and the module.core_size member still exists, and for that matter, it still exists in
Linus's tree.
What happens when you run on the live system? Here's what I see:
# /usr/bin/crash
crash 6.1.1
Copyright (C) 2002-2012 Red Hat, Inc.
Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
Copyright (C) 1999-2006 Hewlett-Packard Co
Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
Copyright (C) 2005, 2011 NEC Corporation
Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
This program 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. Enter "help copying" to see the conditions.
This program has absolutely no warranty. Enter "help warranty" for details.
GNU gdb (GDB) 7.3.1
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu"...
KERNEL: /usr/lib/debug/lib/modules/3.6.10-2.fc17.x86_64/vmlinux
DUMPFILE: /dev/crash
CPUS: 4
DATE: Mon Dec 17 11:21:15 2012
UPTIME: 02:49:12
LOAD AVERAGE: 0.23, 0.21, 0.23
TASKS: 346
NODENAME: escape.usersys.redhat.com
RELEASE: 3.6.10-2.fc17.x86_64
VERSION: #1 SMP Tue Dec 11 18:07:34 UTC 2012
MACHINE: x86_64 (2893 Mhz)
MEMORY: 7.7 GB
PID: 19306
COMMAND: "crash"
TASK: ffff8801fc9fae20 [THREAD_INFO: ffff88019a664000]
CPU: 0
STATE: TASK_RUNNING (ACTIVE)
crash> struct module.core_size
struct module {
[356] unsigned int core_size;
}
crash> mod
MODULE NAME SIZE OBJECT FILE
ffffffffa0006600 i2c_core 38354 (not loaded) [CONFIG_KALLSYMS]
ffffffffa000e160 video 18937 (not loaded) [CONFIG_KALLSYMS]
ffffffffa00410e0 drm 255061 (not loaded) [CONFIG_KALLSYMS]
ffffffffa0053000 i2c_algo_bit 13258 (not loaded) [CONFIG_KALLSYMS]
ffffffffa0059240 wmi 18698 (not loaded) [CONFIG_KALLSYMS]
ffffffffa005e340 ghash_clmulni_intel 13221 (not loaded) [CONFIG_KALLSYMS]
ffffffffa006a2a0 drm_kms_helper 44758 (not loaded) [CONFIG_KALLSYMS]
ffffffffa00dd3c0 i915 534524 (not loaded) [CONFIG_KALLSYMS]
ffffffffa0105be0 mmc_core 102361 (not loaded) [CONFIG_KALLSYMS]
ffffffffa01101a0 sdhci_pci 18658 (not loaded) [CONFIG_KALLSYMS]
ffffffffa011e4a0 sdhci 37836 (not loaded) [CONFIG_KALLSYMS]
ffffffffa0125060 uinput 17674 (not loaded) [CONFIG_KALLSYMS]
ffffffffa012b280 macvtap 18241 (not loaded) [CONFIG_KALLSYMS]
ffffffffa01320c0 macvlan 18732 (not loaded) [CONFIG_KALLSYMS]
...
Dave