Hi,
I have completed sanity test of kdump and here is the result for that,
But it is still needs to be tested on real testing environment (Under
File System stress, LTP etc)
Software:
- 2.6.12-rc2-mm3
- kexec-tools-1.101
- Five kdump user space patches
[http://marc.theaimsgroup.com/?l=linux-kernel&m=111201661400892&w=2]
Test Procedure:
- Built first kernel for 1M location with CONFIG_KEXEC enabled.
- Booted into first kernel with command line options crashkernel=48M@16M.
- Built second kernel for 16M location with CONFIG_CRASH_DUMP, and
CONFIG_PROC_VMCORE enabled.
- Loaded second kernel with following kexec command.
kexec -p vmlinux-16M --args-linux --crash-dump --append="root=<root-dev>
init 1"
- Inserted a module to invoke panic and booted into second kernel.
- Got the dump in /proc/vmcore and copied the /proc/vmcore to disk.
- Booted back to first kernel and ran gdb on stored dump image.
Summary Observation:
- Older versions of gdb like 5.3post-0.20021129.18rh, are not showing the
trace
and thread info properly. On the other hand newer versions like
6.0post-0.20040223.19rh are displaying the information more accrately.
TEST RESULTS
------------
A) Hardware:
- SMP, 2way, PIII Xeon 2.40 GHz, 2G RAM
- Network Interface (e100)
- Disk I/O
SCSI storage controller: Symbios Logic 53c1030
GDB Test Results:
GNU gdb Red Hat Linux (5.3post-0.20021129.18rh)
Copyright 2003 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-redhat-linux-gnu"...
#0 crash_get_current_regs (regs=0xef6b5f28) at
arch/i386/kernel/crash.c:99
99 }
(gdb) info thread
2 process 0 crash_get_current_regs (regs=0xef6b5f28)
at arch/i386/kernel/crash.c:99
* 1 process 10392 crash_get_current_regs (regs=0xef6b5f28)
at arch/i386/kernel/crash.c:99
(gdb) thread 1
[Switching to thread 1 (process 10392)]#0 crash_get_current_regs (
regs=0xef6b5f28) at arch/i386/kernel/crash.c:99
99 }
(gdb) bt
#0 crash_get_current_regs (regs=0xef6b5f28) at
arch/i386/kernel/crash.c:99
#1 0xc011590d in crash_save_self () at arch/i386/kernel/crash.c:107
#2 0xc046ad20 in ident_map ()
(gdb) info register
eax 0xef6b4000 -278183936
ecx 0xef6b5f28 -278175960
edx 0xc0556f80 -1068142720
ebx 0xef6b5f28 -278175960
esp 0xef6b5f1c 0xef6b5f1c
ebp 0xef6b4000 0xef6b4000
esi 0x0 0
edi 0xbf8ffba8 -1081082968
eip 0xc01158de 0xc01158de
eflags 0x86 134
cs 0xef6b0060 -278200224
ss 0xef6b0068 -278200216
ds 0xef6b007b -278200197
es 0xef6b007b -278200197
fs 0x0 0
gs 0x33 51
------------
B) Hardware:
- SMP, 2way, Pentium III (Coppermine) 1 GHz, 1.3G RAM
- Network Interface (e100)
- Disk I/O
- SCSI storage controller: Adaptec Ultra160
GDB Test Results:
GNU GDB 6.2.1
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 "i586-suse-linux"...Using host libthread_db
library "/lib/tls/libthread_db.so.1".
#0 crash_get_current_regs (regs=0xe25d3f30) at crash.c:99
99 }
(gdb) info thread
2 process 18471 sys_open (filename=0x5 <Address 0x5 out of bounds>,
flags=5, mode=5) at open.c:934
* 1 process 18470 crash_get_current_regs (regs=0xe25d3f30) at crash.c:99
(gdb) thread 1
[Switching to thread 1 (process 18470)]#0 crash_get_current_regs
(regs=0xe25d3f30) at crash.c:99
99 }
(gdb) bt
#0 crash_get_current_regs (regs=0xe25d3f30) at crash.c:99
#1 0xc0115b0a in crash_save_self () at crash.c:107
#2 0xc0142705 in crash_kexec () at kexec.c:1032
#3 0xc011f8c0 in panic (fmt=0x0) at panic.c:78
(gdb) info registers
eax 0x0 0
ecx 0xe25d3f30 -497205456
edx 0xe25d2000 -497213440
ebx 0xe25d3f30 -497205456
esp 0xe25d3f24 0xe25d3f24
ebp 0xe25d2000 0xe25d2000
esi 0x0 0
edi 0x0 0
eip 0xc0115ade 0xc0115ade
eflags 0x96 150
cs 0x60 96
ss 0x68 104
ds 0x7b 123
es 0x7b 123
fs 0x0 0
gs 0x33 51
-
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