Question about forcing kernel panic on PowerMac G5 by kexec command

[gib]

Hi Mohan,

> Do you have only one entry for memory node in the /proc/device-tree
directory?
Yes, I have only one entry(for memory) in the /proc/device-tree directory.

> Do you know last good working version of kernel (for kdump) and try to 
> boot into that kernel and check the memory nodes in device-tree?
What is the last version of kernel for kdump which you mentioned?
(now I using the vanilla kernel 2.6.25 version)

Please tell me and I will try to boot into it.

Thank you,
Suchada

-----Original Message-----
From: Mohan Kumar M [mailto:mohan at in.ibm.com] 
Sent: Wednesday, May 14, 2008 1:26 PM
To: gib
Cc: kexec at lists.infradead.org
Subject: Re: Question about forcing kernel panic on PowerMac G5 by kexec
command

gib wrote:
> Hi Mohan,
> 
> Sorry for the late reply.
> 
>> I am not sure about the latest kexec tools. Is it possible to test with 
>> the kexec-tools shipped with the distro?
> 
> I tried to test with the kexec-tools shipped with the distro before and it
> gave me the same result as the latest kexec-tools (kexec-tools-testing
> 20080324).
> 
>> Can you give us the contents of the reg property in the last memory node 
>> in device tree?
> 
> With the command # hexdump /proc/device-tree/memory at 0,0/reg I got
> 0000000 0000 0000 0000 0000 2000 0000 0000 0000
> 0000010 0000 0000 0000 0000 0000 0000 2000 0000
> 0000020 2000 0000 0000 0000 4000 0000 2000 0000
> 0000030 0000 0000 0000 0000 0000 0000 0000 0000
> *
> 0000060
> 

Hi Suchada,

Do you have only one entry for memory node in the /proc/device-tree 
directory?

Do you know last good working version of kernel (for kdump) and try to 
boot into that kernel and check the memory nodes in device-tree?

kexec-tools uses reg property in the memory device nodes to calculate 
the total system memory.

 From above "hexdump", I could not parse the memory properties.

Regards,
Mohan.


> Is it because of this problem that cause the system did not go the next
step
> and kept showing "Sending IPI to other CPU" message?
> 
> Thanks for your help,
> Suchada
>