Re: CVS commit: src/sys

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> On Mon Jan 19 2009 at 23:25:40 +0000, Andrew Doran wrote:
> > > +#ifdef COMPAT_50
> > > +#include <compat/sys/cpuio.h>
> > > +#endif
> > > 
> > > This doesn't work properly any more, when put in code outside a compat
> > > module, because i386 (soon x86) doesn't get this in GENERIC. I sent
> > > a mail about it a while ago, can't remember the title.
> > 
> > As an aside, the documented interface is cpuctl(8). It would be good to have
> > a policy on compatibility (my vote, obviously, is application programs 
> > only!).
> 
> I discussed this with Christos and a few others in passing earlier today,
> and your suggestion is my vote too.  Providing compat is nice, but I don't
> think it's worth the effort for every foobar ioctl and knob in the world
> to benefit the two people who are too lazy to upgrade their whole system.

i personally fully agree that we should relax the compatibility policy.

YAMAMOTO Takashi

> Apart from the policy, we would need somewhere to gather the information,
> preferably next to the interfaces.  Even more challenging, would be nice
> to autodetect changes which don't have the necessary compat support.
> I think I was going to solve the halting problem next week anyway ...