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Date: Tue, 29 Apr 2008 03:05:55 +0200 From: Gabriel C <nix.or.die@...glemail.com> To: Yinghai Lu <yhlu.kernel@...il.com> CC: Mika Fischer <mika.fischer@...pnet.de>, Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...ux-foundation.org>, "H. Peter Anvin" <hpa@...or.com>, LKML <linux-kernel@...r.kernel.org>, Jesse Barnes <jesse.barnes@...el.com>, balajirrao@...il.com, Andi Kleen <andi@...stfloor.org>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [PATCH] x86_32: trim memory by updating e820 v3 Yinghai Lu wrote: > On Mon, Apr 28, 2008 at 3:56 PM, Gabriel C <nix.or.die@...glemail.com> wrote: >> Yinghai Lu wrote: >> > On Mon, Apr 28, 2008 at 2:19 PM, Gabriel C <nix.or.die@...glemail.com> wrote: >> >> Gabriel C wrote: >> >> > Gabriel C wrote: >> >> >> Yinghai Lu wrote: >> >> >>> On Mon, Apr 28, 2008 at 7:24 AM, Gabriel C <nix.or.die@...glemail.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. >> >> >> >> Hmm v4 doesn't work anymore here ( I've tested with all possible settings in BIOS ). >> >> It takes 6 minutes to boot to : >> >> >> > >> > so you card is using 256M and 8M? 0xd0000000-0xe0000000, where is >> > another 8M address. >> >> Looks like this , yes. Is using the 256MB Memory and the 8MB for Graphics Mode Select. >> >> I'm not really sure why the 8MB are needed , BIOS book doesn't tell me. >> I could try to disable and see what I get =) >> >> >> >> > >> > mtrr by BIOS is very interesting: >> > before >> >> > reg02: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1 >> >> > reg06: base=0xcf600000 (3318MB), size= 2MB: uncachable, count=1 >> >> > reg00: base=0xd0000000 (3328MB), size= 256MB: uncachable, count=1 >> >> > reg01: base=0xe0000000 (3584MB), size= 512MB: uncachable, 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 >> > >> > >> > after 256M chunk size got >> >> >>> [ 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] Setting variable MTRR 3, base: 3320MB, range: 8MB, type WB >> >> >>> [ 0.000000] Setting variable MTRR 4, base: 4096MB, range: 512MB, type WB >> >> >>> [ 0.000000] Setting variable MTRR 5, base: 4608MB, range: 256MB, type WB >> >> >>> [ 0.000000] Setting variable MTRR 6, base: 4800MB, range: 64MB, type UC >> > >> > so the convering is right..., need to spare another entry for your card. >> > >> > or we can dumping the >> >> >>> [ 0.000000] Setting variable MTRR 3, base: 3320MB, range: 8MB, type WB >> > for extra entra... >> > >> > but the mtrr trimming code need to be updated instead of only using highest_pfn >> > >> > YH >> > > > please try to test patch with mtrr_chunk_size= 2g; 1g, 512m, 128m. etc. > only for test: i comment out the fill_var_state.. There are the dmesg's , down to 2m and without chunk_size : http://frugalware.org/~crazy/mtrr/mtrr/ > > YH > Gabriel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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