linux-kernel - Re: 2.6.27-rc1 mtrr fixes do not work

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Message-ID: <86802c440808071616o23dde07atd694b45375f9d6ac@mail.gmail.com>
Date:	Thu, 7 Aug 2008 16:16:27 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Alexander Huemer" <alexander.huemer@....ac.at>
Cc:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Andi Kleen" <andi@...stfloor.org>
Subject: Re: 2.6.27-rc1 mtrr fixes do not work

On Thu, Aug 7, 2008 at 3:14 PM, Alexander Huemer
<alexander.huemer@....ac.at> wrote:
> Yinghai Lu wrote:
>>
>> On Thu, Aug 7, 2008 at 1:23 PM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>>
>>>
>>> On Thu, Aug 7, 2008 at 1:15 PM, Pallipadi, Venkatesh
>>> <venkatesh.pallipadi@...el.com> wrote:
>>>
>>>>
>>>> Adding Yinghai.
>>>>
>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: Rafael J. Wysocki [mailto:rjw@...k.pl]
>>>>> Sent: Thursday, August 07, 2008 1:14 PM
>>>>> To: Alexander Huemer
>>>>> Cc: linux-kernel@...r.kernel.org; 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.
>>>>>
>>>>>>
>>>>>> 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 ~ # 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 ~ #
>>>>>>
>>>
>>> alexander,
>>>
>>> please send out
>>> dmesg -s 262144 > dmesg.txt
>>> or
>>> dmesg -s 524288 > dmesg.txt
>>>
>>> you may need to set
>>> CONFIG_LOG_BUF_SHIFT=19
>>>
>>
>> without mtrr_gran_size=64m mtrr_chunk_size=1024m on command line
>>
>> guess mtrr_chunk_size=512m could work
>>
>> YH
>>
>
> yinghai,
>
> thanks for the response.
> i booted with
> mtrr_gransize_64m mtrr_chunk_size_512m
> mtrr_chunk_size_512m
> here are the 2 dmesg outputs:
> http://xx.vu/~ahuemer/dmesg_1.txt
> http://xx.vu/~ahuemer/dmesg_2.txt
>

can you put "debug" in command line too?

YH
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