How to get the information from /proc/files from within a kernel module?

[ravali pullela]

Hi all,

I want process related information like rss.(we can get this by doing cat
/proc/<pid>status) Is there a way to get this from within a kernel module?
I checked out the sources on /proc filesystem. They all show how to create,
read, write a new proc file. But I want to read from an existing proc file
specifically /proc/<pid>/status

I could not find rss info of a process from its task struct in kernel
version 3.10.

I tried to look inside kernel to know how and where are these values (rss
and all) are calculated by kernel. But I could not track it.

Can anyone please point me to either resources or guide me to accomplish
the task of reading information from /proc/files...

I looked up call_usermodehelper but did not find it useful for my need.

Thanks !
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