[Crash-utility] vmcore file size 0 on x86_64

[Chandan12 K]

Hi,

I am little new in this mailing list. I just wondered if anybody could 
help me regarding the vmcore file generation. I ran kexec on my x86_64 
machine, and the /proc/vmcore file is created with zero size.

However, even if I read the /dev/oldmem file, I am only able to read till 
16M. I guess I am only able to read till the 'X', where X is 
crashkernel=Y at X.

Moreover, My machine seems to have 32 bit user space and ofcourse, 64 bit 
kernel space. 

Appreciate any response.

Chandan Kumar
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