RE: 2.6.27-rc1 mtrr fixes do not work

[Pallipadi, Venkatesh]

Adding Yinghai.

>-----Original Message-----
>From: Rafael J. Wysocki [mailto:rjw@xxxxxxx]
>Sent: Thursday, August 07, 2008 1:14 PM
>To: Alexander Huemer
>Cc: linux-kernel@xxxxxxxxxxxxxxx; Andi Kleen; Pallipadi, Venkatesh
>Subject: Re: 2.6.27-rc1 mtrr fixes do not work
>
>[Adding CCs.]
>
>On Wednesday, 6 of August 2008, Alexander Huemer wrote:
>> hi,
>>
>> mtrr is wrong on my machine. the fixes of 2.6.27-rc1 do not
>seem to work.
>> bios is the newest version, mainboard vendor says it's not
>their fault.
>> mainboard is tyan i5000pw.
>> please tell me how i can help and cc me on answers, i am not
>subscribed.
>>
>> here is some data:
>>
>> seaburg ~ # grep -E "(^\(WW\)|^\(EE\)|^\(NI\)|^\(??\))"
>/var/log/Xorg.0.log
>> (WW) VESA(0): Failed to set up write-combining range
>(0xd8000000,0x2000000)
>> seaburg ~ # dmesg|grep mtrr
>> Command line: root=/dev/sda1
>video=uvesafb:1280x1024-24@97,mtrr:3,ywrap
>> mtrr_gran_size=64m mtrr_chunk_size=1024m
>> Kernel command line: root=/dev/sda1
>> video=uvesafb:1280x1024-24@97,mtrr:3,ywrap mtrr_gran_size=64m
>> mtrr_chunk_size=1024m
>> mtrr: type mismatch for d8000000,800000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,400000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,200000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,100000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,80000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,40000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,20000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,10000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,8000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,4000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,2000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,1000 old: write-back new:
>write-combining
>> mtrr: type mismatch for d8000000,2000000 old: write-back new:
>> write-combining
>> seaburg ~ # cat /proc/mtrr
>> reg00: base=0x00000000 (   0MB), size=198656MB: write-back, count=1
>> reg01: base=0x80000000 (2048MB), size=197632MB: write-back, count=1
>> reg02: base=0x100000000 (4096MB), size=197632MB: write-back, count=1
>> seaburg ~ # grep MemTotal /proc/meminfo
>> MemTotal:      4041308 kB
>> seaburg ~ # lspci -v | grep -A10 VGA
>> 20:05.0 VGA compatible controller: XGI Technology Inc.
>(eXtreme Graphics
>> Innovation) Volari Z7 (prog-if 00 [VGA controller])
>>         Subsystem: XGI Technology Inc. (eXtreme Graphics Innovation)
>> Volari Z7
>>         Flags: 66MHz, medium devsel
>>         BIST result: 00
>>         Memory at d8000000 (32-bit, prefetchable) [size=64M]
>>         Memory at dc300000 (32-bit, non-prefetchable) [size=256K]
>>         I/O ports at 3000 [size=128]
>>         Capabilities: [40] Power Management version 2
>>
>> seaburg ~ # zcat /proc/config.gz | grep MTRR
>> CONFIG_MTRR=y
>> CONFIG_MTRR_SANITIZER=y
>> CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
>> CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
>> seaburg ~ # uname -a
>> Linux seaburg 2.6.27-rc1-blackbit #3 SMP Wed Aug 6 00:34:51 CEST 2008
>> x86_64 Intel(R) Xeon(R) CPU E5420 @ 2.50GHz GenuineIntel GNU/Linux
>> seaburg ~ #
>>
>>
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