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

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Date:	Fri, 29 Aug 2008 21:10:53 +0200
From:	Alexander Huemer <alexander.huemer@....ac.at>
To:	Yinghai Lu <yhlu.kernel@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Helge Hafting <helge.hafting@...el.hist.no>
Subject: Re: 2.6.27 mtrr fixes do not work

Yinghai Lu wrote:
> On Fri, Aug 29, 2008 at 8:09 AM, Alexander Huemer
> <alexander.huemer@....ac.at> wrote:
>   
>> Yinghai Lu wrote:
>>     
>>> On Mon, Aug 25, 2008 at 4:29 PM, Alexander Huemer
>>> <alexander.huemer@....ac.at> wrote:
>>>       
>>>> Yinghai Lu wrote:
>>>>         
>>>>> On Mon, Aug 25, 2008 at 1:44 PM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>>>>>
>>>>>           
>>>>>> On Mon, Aug 25, 2008 at 1:24 PM, Alexander Huemer
>>>>>> <alexander.huemer@....ac.at> wrote:
>>>>>>
>>>>>>
>>>>>>             
>>>>>>> what do you mean with tip/master?
>>>>>>>
>>>>>>>               
>>>>>> http://people.redhat.com/mingo/tip.git/readme.txt
>>>>>>
>>>>>>
>>>>>>             
>>>>>>> here is my .config: http://xx.vu/~ahuemer/config.txt
>>>>>>>
>>>>>>>               
>>>>> using your config, i do get mtrr cleanup
>>>>>
>>>>>           
>>>> very interesting, thx.
>>>> so, what can i do to make it working here?
>>>> are there some more debug options i could turn on?
>>>>
>>>>         
>>> can you post whole boot log with command line
>>>
>>> console=uart8250,io,0x3f8,115200n8 debug show_msr=1
>>>
>>> assume you have serial console...
>>>
>>> YH
>>>       
>> yinghai,
>>
>> there are quite good news! 2.6.27-rc5 brought some significant changes.
>> now i get this:
>>
>>    # dmesg|grep -E "(mtrr|uvesafb)"
>>    Command line: root=/dev/sda1 video=uvesafb:1280x1024p-97,mtrr:2
>>    debug show_msr=1
>>    mtrr: your BIOS has set up an incorrect mask, fixing it up.
>>    Kernel command line: root=/dev/sda1
>>    video=uvesafb:1280x1024p-97,mtrr:2 debug show_msr=1
>>    uvesafb: XGI Technology, Inc., Volari Z9s, 1.09.10, OEM: XGI, VBE v3.0
>>    uvesafb: VBIOS/hardware supports DDC2 transfers
>>    uvesafb: monitor limits: vf = 97 Hz, hf = 129 kHz, clk = 364 MHz
>>    uvesafb: scrolling: redraw
>>    uvesafb: framebuffer at 0xd8000000, mapped to 0xffffc20002100000,
>>    using 10240k, total 32768k
>>    mtrr: 0xd8000000,0x2000000 overlaps existing 0xd8000000,0x800000
>>    # grep -E "(^\(WW\)|^\(EE\)|^\(NI\)|^\(??\))" /var/log/Xorg.0.log
>>    (WW) VESA(0): Failed to set up write-combining range
>>    (0xd8000000,0x2000000)
>>    # cat /proc/mtrr
>>    reg00: base=0x00000000 (   0MB), size=2048MB: write-back, count=1
>>    reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
>>    reg02: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
>>    reg03: base=0xd8000000 (3456MB), size=   8MB: write-back, count=1
>>     
>
> it seems BIOS setup extra entry (8M) and that is conflict with that of
> from graphical card.
>
> can you send out
> dmesg -s 262144 > dmesg.txt
> and
> lspci -vvxxx
> lspci -tv
>
> so could find out if your graphical card is really allocated the memory area...
>
> YH
>   
http://xx.vu/~ahuemer/dmesg_5.txt
http://xx.vu/~ahuemer/lspci_vvxxx.txt
http://xx.vu/~ahuemer/lspci_tv.txt

-- 
regards
alex
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