[Ilugc] kernel to app and app to kernel communication : Preferred method

From: steve@xxxxxxxxxxxx (steve)
Date: Thu, 30 Dec 2010 02:49:11 +0530

Hi,

On 12/29/2010 07:03 PM, Manikandan B wrote:

Hello

I understand that there are many mechanisms for passing data between kernel
code and user space code in Linux. But which is the preferred method in 2.6
?

Depends on what kind of data you would like to pass. If you want to pass a
single value at initialization to your driver use a module parameter[1]. If you
want to pass a tunable parameter, create a /proc entry for your module[2]. If
you want any other dynamic data passing from user space to kernel space (for
example communicating with a user space daemon/tool) use copy_[from|to]_user[3].

cheers,
- steve

[1] http://www.google.com/search?q=linux+kernel+module_param
[2] http://www.google.com/search?q=linux+kernel+create_proc_entry
[3] http://www.google.com/search?q=linux+kernel+copy_from_use

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Follow-Ups:
- [Ilugc] kernel to app and app to kernel communication : Preferred method
  - From: Bharathi Subramanian

References:
- [Ilugc] kernel to app and app to kernel communication : Preferred method
  - From: Manikandan B

Other related posts:

» [Ilugc] kernel to app and app to kernel communication : Preferred method- Manikandan B
» [Ilugc] kernel to app and app to kernel communication : Preferred method- Mohan L
» [Ilugc] kernel to app and app to kernel communication : Preferred method - steve
» [Ilugc] kernel to app and app to kernel communication : Preferred method- Bharathi Subramanian
» [Ilugc] kernel to app and app to kernel communication : Preferred method- Kenneth Gonsalves