Re: Replacement for page fault notifiers?

Pavel Roskin
2008-01-09T20:41:19Z

On Wed, 2008-01-09 at 20:26 +0000, Christoph Hellwig wrote:
> On Wed, Jan 09, 2008 at 03:24:16PM -0500, Pavel Roskin wrote:
> > I just assumed (wrongly, as it seems) that the API change didn't remove
> > any useful functionality.
>
> No, this was exactly the correct assumption. Out of tree modules simply
> don't count.
>
> > The problem is that mmiotrace only makes sense in combination with
> > non-free drivers, and I'm not sure it would be welcome in the kernel
> > even if you say so.
>
> It can trace every driver in theory although it's of course not
> really interesting for free drivers. But it's not actually
> functionality used by the drivers but functionlity to trace the drivers
> so it's quite different anyway.

OK, that's reassuring. Maybe it could be used for profiling or to find
bugs that are not obvious otherwise.

--
Regards,
Pavel Roskin