how to enable linux box to dump crash image on local disk

[sumeet gandhare]

hi Amit,

On Wed, Aug 17, 2011 at 3:04 PM, amit mehta <gmate.amit at gmail.com> wrote:

> I've a Linux box which is crashing under a particular test scenario.
> To debug this issue I was thinking of using the crash (man 8 crash)
> utility (available by default on recent releases of RHEL and SuSE) .
> This tool requires the kernel crash dump (vmcore) and the debugging
> symbols.
> On my machine, I don't see any crash under /var/crash, Hence please
> let me know the
> configuration changes which i need to do to enable my machine to dump
> the kernel image
> locally (do i need to apply diskdump patches and rebuild the kernel??)
> whenever
> there is a kernel crash. Kdump seem to be another tool for this job
> but that requires a lot of
> setup. Is there a *shortcut* to enable kernel crash dump facility ?
>
> The debugging symbols can be found here:
> http://ftp.riken.go.jp/Linux/slc/slc6X/updates/x86_64/debug/
> http://ftp.riken.go.jp/Linux/slc/slc6X/updates/i386/debug/
>
>
>
 You need to configure kdump  on  your RHEL system to enable it to dump the
vmcore file when the panic happens... Kdump configuration is explained
below.. There is a crashkernel boot parameter to be passed to kernel to
specify the memory reserved for the crash kernel.

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/ch-kdump.html

http://www.mindtwist.de/main/linux/11-red-hat/27-how-to-configure-kernel-dumps-on-rhel-5.html

http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=/liaai/crashdump/liaaicrashdumpconfigkdump.htm


Thanks and Regards,
Sumeet


> -Amit
>
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