Messages in this thread |  | | Date | Wed, 13 Dec 2000 11:55:06 +0100 | From | Jamie Lokier <> | Subject | Re: 2.2.16 SMP: mtrr errors |
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Alan Cox wrote: > > 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.
> > 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
The kernel VESA framebuffer has exactly the same problem. Sometimes VESA reports 2.5Mb video memory, and vesafb's attempt to register an MTRR fails.
But should vesafb know about Intel-specific MTRR limitations, given that those limitations may change?
-- Jamie - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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