Re: copy to suer space

Mike Fedyk
2001-11-21T00:07:30Z

On Tue, Nov 20, 2001 at 12:39:15PM -0700, Andreas Dilger wrote:
> On Nov 20, 2001 18:44 +0000, Lu?s Henriques wrote:
> > > Maybe if you describe the actual problem that you are trying to solve, and
> > > not the actual way you are trying to solve it, there may be a better
> > > method. Usually, if something you are trying to do is very hard to do,
> > > there is a different (much better) way of doing it.
> >
> > I'm developping a kernel module that needs to delay a process, that is, he
> > receives a PID and, when a specific event occurs, that process shall be
> > delayed. This delay shall be done in a way that the process keeps burning CPU
> > time (it can not be, e.g., put in a waiting-list...).
>
> Putting it into a waiting-list is by far the best solution. This is a normal
> Unix operation, like SIGSTOP, SIGCONT, and could even be done from user space.
>
> What is the requirement that it keeps burning CPU for? Generally, this is
> what you do NOT want to do.
>

This to me looks like the main desire is to fool the user. It looks like it
doing something, but it really isn't...