Re: MTRR & NVTNT

Richard Gooch (rgooch@atnf.csiro.au)
Sun, 14 Mar 1999 11:06:01 +1100

Alan Cox writes:
> > What do you mean "the right thing"? If you have a FB which requires an
> > embedded uncachable region, you need two MTRRs. So the function will
> > allocate two. If you don't have two left, bad luck, you get an error
> > return.
> > What else can you do? Buy a better CPU :->
>
> Prioritize actually allocations

Erm, you mean if you have two FBs, you give each a different priority,
and if a higher priority FB wants MTRRs but a low priority FB has
already taken the two MTRRs, go ahead and grab the MTRRs anyway?

Is this really needed? It's getting more complicated (can you say
"bloat") for what appears to be a fairly uninteresting and uncommon
problem.

Regards,

Richard....

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