Messages in this thread | | | Date | Mon, 28 Apr 2008 22:45:31 +0200 | From | Gabriel C <> | Subject | Re: [PATCH] x86_32: trim memory by updating e820 v3 |
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Gabriel C wrote: > Yinghai Lu wrote: >> On Mon, Apr 28, 2008 at 7:24 AM, Gabriel C <nix.or.die@googlemail.com> wrote: >>> Mika Fischer wrote: >>> > Hi Ingo, >>> > >>> > I'm having the same problem. >>> > >>> > Ingo Molnar schrieb: >>> >> excellent. So just to make sure: this box never had proper graphics >>> >> under Linux (under no previous kernel), due to the way the BIOS has set >>> >> up the MTRR's, right? >>> > >>> > Well, not quite. X still works fine, but since the video memory is >>> > overlapped by two of the existing MTRRs, X cannot add a write-combining >>> > range for the video memory. That makes X rather slow especially if you >>> > use DRI for Compiz etc. >>> >>> Well you are lucky then :) >>> >>> Yeah X 'worked' but it worked as slow as with vesa video driver here. >> [ 0.000000] rangeX: 0000000000000000 - 00000000d0000000 >> [ 0.000000] Setting variable MTRR 0, base: 0MB, range: 2048MB, type WB >> [ 0.000000] Setting variable MTRR 1, base: 2048MB, range: 1024MB, type WB >> [ 0.000000] Setting variable MTRR 2, base: 3072MB, range: 256MB, type WB >> [ 0.000000] range0: 00000000cf800000 - 00000000cf800000 >> [ 0.000000] range: 00000000cf800000 - 00000000d0000000 >> [ 0.000000] Setting variable MTRR 3, base: 3320MB, range: 8MB, type WB >> [ 0.000000] range0: 0000000100000000 - 0000000120000000 >> [ 0.000000] Setting variable MTRR 4, base: 4096MB, range: 512MB, type WB >> [ 0.000000] range: 0000000120000000 - 0000000130000000 >> [ 0.000000] Setting variable MTRR 5, base: 4608MB, range: 256MB, type WB >> [ 0.000000] hole: 000000012c000000 - 0000000130000000 >> [ 0.000000] Setting variable MTRR 6, base: 4800MB, range: 64MB, type UC >> >> so your X server need two entries for WB? >> >> can you send out /proc/mtrr with booting with disable_mtrr_cleanup? > > I can just not right now , cannot reboot the box yet. In about 1h or so , maybe less.
Here the output with v3 which is disabled by default:
--($:~)-- cat /proc/mtrr reg00: base=0xd0000000 (3328MB), size= 256MB: uncachable, count=1 reg01: base=0xe0000000 (3584MB), size= 512MB: uncachable, count=1 reg02: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1 reg03: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 reg04: base=0x120000000 (4608MB), size= 128MB: write-back, count=1 reg05: base=0x128000000 (4736MB), size= 64MB: write-back, count=1 reg06: base=0xcf600000 (3318MB), size= 2MB: uncachable, count=1
dmesg is saying now :
[ 22.764595] mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining
My card settings in BIOS ( that was default ) are the following :
DVMT Mode -> DVMT Mode ( possible setting DVMT Mode or Fixed Mode ) DVMT / Memory -> 256MB ( possible settings 128/256 MB or Maximum DVMT )
Initiate Graphics Adapter -> PEG/PCI ( possible settings IGD , PCI/IGD , PCI/PEG , PEG/IGD ) Internal Graphics Mode Select -> Enabled,8MB ( possible settings Enabled,8MB , Enabled,1MB maybe Disabled I forgot to look) PEG Port -> Auto ( possible settings Auto , Disabled ) PEG Port Force x1 -> Disabled ( possible settings Enabled , Disabled )
Of course these settings are only possible when the card is not disabled :)
I'm gonna try v4 now and enable it. Please let me know if you need more infos.
Gabriel
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