Messages in this thread | | | Date | Sat, 31 Mar 2001 02:52:33 +0200 | From | Pavel Machek <> | Subject | Re: fbcon slowness [was NTP on 2.4.2?] |
| |
Hi!
> > Ug!!! This is getting bad. Give me some time. I plan on releasing a new > > vesafb using MMX to help speed up the drawing routines. It will help alot > > with the latency issues. I also know using ARM assembly we can greatly > > reduce the latency issues. > > There is another issue with vesafb. It tries to use an MTRR, but this > fails for the 2.5MB region that is video RAM because 2.5MB is not a > power of two. > > The console driver does not actually use 2.5MB. Does it make sense to > use an MTRR for the smaller power-of-two region?
I had patch which tried that at one point. Just try all 2^n numbers <= size until it succeeds. Pavel -- The best software in life is free (not shareware)! Pavel GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |