Re: scheduling callbacks in user space triggered via kernel....

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 22 May 2001 22:05:02 +0100 (BST)


> Is there a method to schedule user mode code from kernel agent?

You can wake user processes,send them signals etc but ingeneral its not
a good idea

> registers with the kernel mode agent with a function/parm to run, then when
> the callback is appropriate the kerenl agent triggers this callback to
> happen.

The unix model is much more that the app does

while(1)
{
get_event(fd);
switcH(event)
{
..
...
}
}

> or a method to bind a function to a file handle, when there is Completed IO,
> the kernel would call the registered function with a parameter of the buffer
> submitted for IO.

The b_end_io callback can possibly be used, or Ben's asynchronosu callbacks,
but that deals with kernel level completion.

Alan

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