Re: [suspend/resume] Re: userspace notification from module

[Andy Walls]

On Sat, 2010-01-02 at 16:15 +0100, Daniel Borkmann wrote:
> Hi BartÅomiej,
> 
> 2010/1/2 BartÅomiej ZimoÅ <uzi18@xxxxx>
> >
> > This looks like more simple and could be good, after all i think about sending this
> > module here to add to kernel. So if this solution could be ok i will start to code this part.
> >
> > Question is now what signal to choose to not terminate process and to be compatible
> > with rest of Linux kernel?
> 
> Have a look at linux/signal.h. There's a section for non-POSIX
> signals. May be you
> could add a SIGSUS or sth similar into that list with a free signal
> number to stay
> compatible with the rest of the numbers.
> 
> Cool thing is that you now will have a kind of "observer" principle:
> Don't call us, we call you ;)


Why not:

a. write a module that implements a device node that supports poll(),
and

b. have a user space process select() on the fd for read or exception
notification

?

Regards,
Andy

> Cheers,
> Daniel Borkmann


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