Messages in this thread | | | Date | Thu, 1 May 2008 14:31:16 -0700 | From | "Yinghai Lu" <> | Subject | Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect v2 |
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On Thu, May 1, 2008 at 2:26 PM, H. Peter Anvin <hpa@zytor.com> wrote: > Yinghai Lu wrote: > > > > > > > > > > > > > > > > > Yes, 16 GB systems are already mainstream; 32 GB is common, so I don't > see > > > any reason to stop at 2 GB. Instead, it should loop up to the physical > > > address size. > > > > > > > but our objective is that has 0xd0000000-0xe0000000 (WC) not to be > > overlapping with other MTRR entries (UC).. > > > > > > So, pray tell, how comes this algorithm can come up with a non-solution to > the problem presented to it? > > Overall, I'm feeling there is something really completely wrong if this > needs manual tunables of any sort.
the problem is BIOS set MTRR like BIG WB - SOME SAMLL UC to spare mtrr regs.
but later X server driver want to set some range to WC. that already is fallen in UC...
YH
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