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

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Message-ID: <86802c440808071323o3021a90rae51223187bfd47b@mail.gmail.com>
Date:	Thu, 7 Aug 2008 13:23:35 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Alexander Huemer" <alexander.huemer@....ac.at>,
	"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 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

YH
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