X performance problems with Matrox G550
lists at ebourne.me.uk
Thu Nov 4 06:18:51 PST 2004
On Thu, 2004-11-04 at 13:53, Thomas Winischhofer wrote:
> Martin Ebourne wrote:
> (WW) MGA(0): Failed to set up write-combining range (0xd8000000,0x2000000)
> MTRR support in your kernel seems to be disabled.
Sorry but that doesn't make sense to me. I described in that email how I
could add a write-combining range manually by using:
# echo "base=0xd8000000 size=0x2000000 type=write-combining" >| /proc/mtrr
# cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
reg01: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=1
reg02: base=0xd8000000 (3456MB), size= 32MB: write-combining, count=1
Surely if the kernel support was disabled that wouldn't work?
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