On March 9, 2015 10:07:28 PM EDT, Arshad Hussain [off-list ref] wrote:

On 08-Mar-2015, at 11:00 pm, Jamal [off-list ref] wrote:

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Hi..

After reading Documentation on System.map, i understood that ,

whenever 

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an oops happens the following addresses  will be converted to its 
function name by klogd daemon using System.map.

Now when we have /proc/kallsyms which stores the symbol table in the 
kernel image itself.Then what is the need of System.map file??Is any 
process or daemon still using it??

My 2 cents. 

No.

However, Since kallsyms bloats the kernel and makes it larger
production kernel may not have it. 
In such case it will rely on System.map and ksymsoops for decoding oops
messages.

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Regards,
Md.Jamal

Thanks 

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MD. Jamal, 
You are 100 percent correct here adding features related to kernel debugging can easily bloat the kernel be a few gigabytes installed, easily terrible for any production where the storage space can be better used for various other applications or even important debugging log files. 
Nick 

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