Re: [PATCH]: uClinux (MMU-less) patches against 2.5.28

[Alan Cox]

On Fri, 2002-07-26 at 10:58, David Woodhouse wrote:
> 
> [e-mail] said:
> >  Now consider two events each locking the page the other wishes to
> > write to. At that point you may want to stop digging any deeper holes 
> 
> Maybe, but only if we can come up with a better alternative. 
> 
> Bear in mind that XIP is not for general-purpose use, and strict 
> restrictions on what you can do with it are not unreasonable. Assume we 
> remove O_DIRECT support entirely from any kernel which supports XIP. Then 
> what breaks?

Anything where you rely on locking the pages and can get a loop of
locked/absent pages and deadlock