Re: Suggestion: LKM should be able to add system call for itself

[Bart Van Assche]

On Mon, Jul 7, 2008 at 7:09 AM, Jinkai Gao <mickeygjk@xxxxxxxxx> wrote:
> LKM(loadable kernel module) was first introduced for drivers. Users
> rarely need to talk to the modules directly. If does, several methods
> are available now, such as /proc file, interruption, etc. However,
> these interfaces are predefined, which makes the communication between
> user space and kernel space quite restricted.

Did you already have a look at e.g. http://lwn.net/Kernel/LDD3/ for
suggestions of alternatives for communication between userspace and
kernel modules ? Alternatives to system calls are e.g. ioctl's, memory
mapped I/O and sockets. The last alternative is used by udevd
(PF_NETLINK).

Bart.
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