crash read error: kernel virtual address / vmcore address mismatch ?

Anand Raj Manickam anandrm at
Tue May 7 09:40:10 EDT 2013

Hi ,
Sorry about re posting this as i did not find solution ...

I m facing a issue where on

#crash /data/linux- /proc/vmcore

crash 6.1.6
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crash: read error: kernel virtual address: c127a9c8  type: "cpu_possible_mask"

I did follow few threads around , I have a case similar to

Both the System Kernel and the Debug Kernel are the same.

My current config for


The /proc/kallsyms is diffrent between the System Kernel and Debug Kernel.
On the System Kernel it starts from 0x400000 .On the Debug kernel it
starts from 0x1000000 .

if  i change the CONFIG_PHYSICAL_START=0x400000 . It does NOT core dump.

my crashkernel=128M is the setting on grub.
Let me know if you need more info


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