Re: 2.2.16 SMP: mtrr errors

Paul C. Nendick
2000-12-12T22:29:36Z

Shall I submit this to Matrox as a bug then?

/paul

Alan Cox (alan@lxorguk.ukuu.org.uk) said:

> > Petr, the Matrox card splits the memory between the two video screens
> > when running in a multi-head configuration and "pretends" that it is two
> > distinct cards. Thus, a 32 mb card will register an mtrr for 24mb and
> > for 8mb seperately when in this mode.
>
> That is a driver bug. The intel processors only support MTRR's on certain
> power boundaries/sizes. The fall through is intended.
>
> > to fall through, but is this correct? I've inserted a break at the end
> > of the Intel switch before and have not had problems, but I left it out
>
> Lucky
>
> > in the latest couple of kernels because of all the mtrr work being done,
> > waiting to see if there was resolution.
>
> The Matrox driver needs to register a single 32Mb MTRR
>

--
Paul C. Nendick