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CHAPTER 5 Work after Operating System installation
5.5 Setup of dump environment (Linux)
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In MMB WebUI, Select [Partition], and select [NMI] in [Power Control], and click [Apply]
2) If Kdump does not start, then start sadump
In MMB WebUI, Select [Partition], and select [sadump] in [Power Control], and click [Apply]
When memory dumping by sadump starts, the following message is displayed in console screen, and the number is
counted up gradually.
[ 0.0%].
The number becomes 100 and the following message is displayed when memory dump is finished.
Dumping Complete
After memory dump is finished and OS is rebooted, confirm memory dump by using crash command.
This is an example to check memory dump which is saved on /dev/sdb1. The “DATE” means the date and time when
memory dump was captured.
# crash /usr/lib/debug/lib/modules/2.6.32-358.el6.x86_64/vmlinux /dev/sdb1
(snip)
KERNEL: /usr/lib/debug/lib/modules/2.6.32-358.el6.x86_64/vmlinux
DUMPFILE: /dev/sdb1
CPUS: 2
DATE: Fri Oct 11 09:10:39 2013
UPTIME: 00:19:04
LOAD AVERAGE: 0.14, 0.03, 0.01
TASKS: 125
NODENAME: localhost
RELEASE: 2.6.32-358.el6.x86_64
VERSION: #1 SMP Tue Jan 29 11:47:41 EST 2013
MACHINE: x86_64 (1861 Mhz)
MEMORY: 4 GB
PANIC: "Oops: 0002 [#1] SMP " (check log for details)
PID: 7866
COMMAND: "bash"
TASK: ffff8801387c8aa0 [THREAD_INFO: ffff8801394e2000]
CPU: 0
STATE: TASK_RUNNING (PANIC)
5. Send memory dump to vendor
Send memory dump to vendor who supports RHEL. makedumpfile command can be used to convert memory dump to a
normal file. makedumpfile can generate small dump file by compression or filtering. Read man manual of makedumpfile for
details. This is an example of saving memory dump on /dev/sdb1 to a vmcore file using compression and filtering out
memory region except kernel memory(Write following command in one line).
# makedumpfile –c –d 31 –x
/usr/lib/debug/lib/modules/2.6.32-358.el6.x86_64/vmlinux /dev/sdb1 vmcore