Re: patent on O_ATOMICLOOKUP [Re: [PATCH] loopable tmpfs (2.4.17)]

Daniel Phillips
2002-05-25T05:56:41Z

On Saturday 25 May 2002 06:27, Linus Torvalds wrote:
> On Fri, 24 May 2002, Linus Torvalds wrote:
> >
> > You know what? I don't care. If the RTAI people are trying to make it easy
> > for non-GPL module people, I have absolutely zero interest.
>
> [ Clarification: here "module" is not just "the thing you insert with
> insmod". In RTAI it's a mlock'ed user-level thing that has higher
> priority than the kernel, and can thus trivially crash the system.
> Whether it runs in CPL0 or CPL3 is immaterial at that point - a crash is
> a crash, and I'm not interested in systems where I cannot debug the
> thing that caused it ]

This issue is easily dealt with by requiring root for the rt_task_init
call.

As for debugging the thing, Linus doth protest too much.

--
Daniel